The Sky At Night; The Forgotten Nature

[Fowad]

Here we can inform each other of the situation of the masses in night sky and important astronomical events in future and discuss about their conditions

[stargazer]

This Week's Sky at a Glance


Monday, July 11


Look 2° or 3° below the Moon for Antares early this evening, as shown below.




http://media.skyandtelescope.com/images/Webvic11_Jul12ev.jpg (http://media.skyandtelescope.com/images/Webvic11_Jul12ev.jpg)



The Moon crosses Scorpius and Sagittarius as it waxes to full. In these scenes, the Moon is always placed for an observer in the middle of North America. European skywatchers: move each Moon symbol a quarter of the way toward the one for the previous date. The Moon is shown three times its actual apparent diameter.
Sky & Telescope (https://secure.palmcoastd.com/pcd/FormRedirect?iID=4011181) diagram






Tuesday, July 12



Happy birthday Neptune! Today it's exactly one Neptune year since the planet's discovery in 1846.
Never again will a major planet of the solar system have failed to complete a full orbit since it was found. See the July Sky & Telescope (https://secure.palmcoastd.com/pcd/FormRedirect?iID=4011181), page 28. To locate Neptune with your binoculars or telescope (at magnitude 7.9), you can use our printable finder chart (http://media.skyandtelescope.com/documents/Uranus-Neptune-2011.pdf).



Wednesday, July 13



Look below the bright Moon for the Teapot pattern of Sagittarius, as shown above.



Thursday, July 14



Full Moon tonight (exact at 2:40 a.m. Friday morning Eastern Daylight Time). The Moon is left of the Sagittarius Teapot after dark.





http://media.skyandtelescope.com/images/Beta-Lyrae-finder_341px.jpg (http://media.skyandtelescope.com/images/Beta-Lyrae-finder_341px.jpg)



The little constellation Lyra dangles below Vega these evenings. For much of the time, Beta Lyrae is almost exactly as bright as Gamma. However. . . .
Akira Fujii




The eclipsing binary star Beta Lyrae is coming out of its minimum light at the time of nightfall for the Americas. See the June Sky & Telescope (https://secure.palmcoastd.com/pcd/FormRedirect?iID=4011181), page 60.



Friday, July 15



After the just-past-full Moon rises well up late this evening, use binoculars to look a little above it for Beta Capricorni and, higher, the wide double star Alpha Capricorni. With good distance vision, you can normally split Alpha Cap naked-eye. Can you still do this with the bright Moon so close?



Saturday, July 16



With summer almost a third of the way through, the Big Dipper is descending in the northwest after dark and starting to scoop to the right, dipper-wise, as if picking up water to dump over the world in the evening next spring.






All descriptions that relate to your horizon — including the words up, down, right, and left — are written for the world's mid-northern latitudes. Descriptions that also depend on longitude (mainly Moon positions) are for North America. Eastern Daylight Time (EDT) equals Universal Time (also known as UT, UTC, or GMT) minus 4 hours

From: Sky & telescope

[stargazer]

This Week's Planet Roundup



Mercury (magnitude 0.0) remains very low in the west-northwest in twilight. Don't confuse it with Regulus well to its upper left. Mercury and Regulus will pass 3° apart on July 26th.


Venus is disappearing deep into the glow of sunrise.


Mars (magnitude +1.4, in Taurus) is moderately low in the east-northeast as dawn begins to brighten. Look for it very far lower left of bright Jupiter. To the right of Mars (by 6° to 10°: this week) is Aldebaran, similar in brightness and color.
In a telescope Mars is still just a tiny blob only 4.3 arcseconds in diameter. It's on its way to a poor opposition (13.9 arcseconds wide) next March.



http://media.skyandtelescope.com/images/jup-by-Go_2011-06-08.jpg (http://media.skyandtelescope.com/images/jup-by-Go_2011-06-08.jpg)



Jupiter is coming into better view now in the dawn, but it's still very far from its best. Christopher Go (http://jupiter.cstoneind.com/) obtained this fine stacked-video image on June 8th. Jupiter's dark South Equatorial Belt (above center) has fully returned and is very wide. The narrower North Equatorial Belt remains darker red-brown, with even darker barges. At the time of the photo the Great Red Spot had just barely passed the planet's central meridian (where the System II longitude was 163°). The SEB practically encompasses the Red Spot, and the Red Spot Hollow around the spot has changed from white to dark. South is up.
Christopher Go (http://jupiter.cstoneind.com/)




Jupiter (magnitude –2.3, in southern Aries) rises around 1 or 2 a.m. daylight saving time and
shines high in the east by dawn.



Saturn (magnitude +0.9, in Virgo) is southwest after dusk and sinking lower. Shining 14° left of it
is similar, but bluer, Spica. And about 1° to Saturn's right is fainter Porrima (Gamma Virginis), still forming a striking pair with it.
In a telescope, Saturn's rings are 7.6° from edge on. The rings are casting their shadow southward onto the globe as a thin black line. The globe's shadow on the rings is just off the globe's celestial east (following) side. The North Equatorial Belt is a dusky band. Identify the Saturnian satellites visible in your telescope with our Saturn's moons tracker (http://www.skyandtelescope.com/s?action=login&rurl=http://www.skyandtelescope.com/observing/objects/javascript).


Uranus (magnitude 5.9, in western Pisces) and Neptune (magnitude 7.9, in western Aquarius) are about equally high now before the very first light of dawn, in the southeast and south, respectively. Neptune is having its first birthday this week, at least from the human point of view; see July 12 above. Here's our printable finder chart (http://media.skyandtelescope.com/documents/Uranus-Neptune-2011.pdf) for both planets.


Pluto (magnitude 14.0, in northern Sagittarius) is highest in the south around midnight. A big finder chart for it is in the July Sky & Telescope (https://secure.palmcoastd.com/pcd/FormRedirect?iID=4011181), page 64.




All descriptions that relate to your horizon — including the words up, down, right, and left — are written for the world's mid-northern latitudes. Descriptions that also depend on longitude (mainly Moon positions) are for North America. Eastern Daylight Time (EDT) equals Universal Time (also known as UT, UTC, or GMT) minus 4 hours.

From: Sky & Telescope

[stargazer]

This Week's Sky at a Glance

Some daily events in the changing sky for December 2 – 10



by Alan M. MacRobert



Friday, Dec. 2



First-quarter Moon (exact at 4:52 a.m. on this date). The Moon, high in the south at dusk, shines below the western side of the Great Square of Pegasus this evening. It's between the Water Jar of Aquarius to its right, and the dimmer Circlet of Pisces to its left.
Mars is at quadrature, 90° west of the Sun in the morning sky. Therefore, in a telescope Mars is as gibbous as it's going to appear this season (90% sunlit).

Saturday, Dec. 3

Orion is up! With winter approaching, bright Orion rises into good view in the east-southeast by 8 or 9 p.m. now. In its middle, the three-star line of Orion’s Belt is nearly vertical — as it always is when Orion displays itself in this part of the sky (viewed from mid-northern latitudes).

Sunday, Dec. 4

Two reappearances of Jupiter’s moons tonight: Europa emerges from eclipse out of Jupiter’s shadow around 10:35 p.m. EST. Then Io emerges around 1:52 a.m. EST. A good telescope will show them gradually swelling into view just off the planet’s eastern edge.

Monday, Dec. 5

Jupiter shines lower left of the Moon this evening. Although they look close together, Jupiter is 1,550 times farther away — and 40 times larger in diameter.
In a telescope, Jupiter’s tiny moon Io casts its shadow on the planet’s face from 8:54 to 11:04 p.m. EST. Then Jupiter’s Great Red Spot crosses the planet’s central meridian around 12:17 a.m. EST. (For all Red Spot transit times and events among Jupiter's moons this month, visible worldwide, see "Action at Jupiter" in the December Sky & Telescope, page 60.)

Tuesday, Dec. 6

Jupiter shines to the right of the Moon in twilight, as shown below. Later in the evening it swings to the Moon’s lower right


http://media.skyandtelescope.com/images/Webvic2011_Dec07ev.jpg (http://media.skyandtelescope.com/images/Webvic2011_Dec07ev.jpg)



Follow the Moon advancing eastward day by day.
Sky & Telescope diagram


Wednesday, Dec. 7

The bright eclipsing variable star Algol should be in one of its periodic dimmings, magnitude 3.4 instead of its usual 2.1, for a couple hours centered on 11:56 p.m. EST; 8:56 p.m. PST. Algol takes several additional hours to fade and to rebrighten. (Here's a comparison-star chart (http://media.skyandtelescope.com/images/Algol_Chart_l.jpg) giving the magnitudes of three stars near Algol; you can use these to judge Algol's changing brightness.)

Thursday, Dec. 8

The Moon shines in Taurus near the Pleiades this evening, as shown above. You may need binoculars to pick them out of the lunar glare.

Friday, Dec. 9

Look lower right of the full Moon for Aldebaran this evening, and higher above Aldebaran for the Pleiades. Way off to their left shines Capella


http://media.skyandtelescope.com/images/LunarEclipse_Oct-27-2004_by.jpg (http://media.skyandtelescope.com/images/LunarEclipse_Oct-27-2004_by.jpg)



The totally eclipsed Moon of October 27, 2004.
S&T: Richard Tresch Fienberg


A total eclipse of the Moon happens for western North America before dawn Saturday morning. Look for the dim, ruddy eclipsed Moon sinking low in the west-northwest before or during dawn. The eclipsed Moon hangs high in middle of the night for Australia and Japan, and in the evening sky of the 10th as seen from much of Asia.

The Moon is totally within the umbra of Earth’s shadow for 52 minutes, from 14:05 to 14:57 UT (GMT). The partial stages before and after totality each last more than an hour. See our article A Dawn Eclipse of the Moon (for central or western North America) (http://www.skyandtelescope.com/observing/highlights/A-Dawn-Eclipse-of-the-Moon-134436603.html), or the fuller article in the December Sky & Telescope, page 58.

Saturday, Dec. 10

This evening the Moon shines amid Capella to its upper left, Aldebaran to its upper right, Betelgeuse to its lower right, and Pollux and Castor farther to the Moon’s lower left. Algol is at minimum brightness for a couple hours centered on 8:46 p.m. EST.



From: S&T

[stargazer]

Celestial Events from 2012 Astronomy Calendar



From: Sea and Sky

Important Events in February:


February 20 - March 12 -Best Chance to see Mercury. The planet Mercury will be far enough from the Sun's glare to be visible shortly after sunset. Mercury will

reach greatest elongation from the Sun on March 5, reaching a relatively bright magnitude of about -1. This will be your best chance to see the planet this year.


February 21 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 22:35 UTC.

[stargazer]

March 8 - Full Moon. The Moon will be directly opposite the Earth from the Sun and will be fully illuminated as seen from Earth. This phase occurs at 09:39 UTC.


March 14 - Conjunction of Venus and Jupiter. The two brightest planets in the sky will be within 3 degrees of each other in the evening sky. On March 25 and 25, the crescent Moon will be near the two planets, creating a dazzling evening spectacle.


March 20 - March Equinox. The March equinox occurs at 05:14 UTC. The Sun will shine directly on the equator and there will be nearly equal amounts of day and night throughout the world. This is also the first day of spring (vernal equinox) in the northern hemisphere and the first day of fall (autumnal equinox) in the southern hemisphere.


March 22 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 14:37 UTC.

[هانیه امیری]

March 5: Mercury reaches greatest eastern elongation .


[/URL][URL="http://www.astroupload.com/uploads/13309427731.png"]http://www.astroupload.com/uploads/13309427731.png (http://www.astroupload.com/uploads/13309427731.png)


Today it lies farthest from the Sun. Unfortunately, this planet never climbs high. Because mercury orbits closer to the Sun than any other planet.

You can see this innermost planet in the west shortly after sunset.

[هانیه امیری]

Best Venus-Jupiter conjunction in mid-March 2012




At mid-northern latitudes, these two brightest planets – Venus and Jupiter – stay out for nearly four hours after sunset. That’s about the longest period possible at these latitudes. You can find these two worlds in the west as darkness falls.


[/URL][URL="http://www.astroupload.com/uploads/13316263471.png"]http://www.astroupload.com/uploads/13316263471.png (http://www.astroupload.com/uploads/13316263471.png)


The two brightest points of light will remain this close through March 15

[هانیه امیری]

March 16: comet garradd is near Draco


Tonight the famous comet of recent monthes - Comet Garradd - passes by the tail star of Draco :Lambda (λ) Draconis



[/URL][URL="http://www.astroupload.com/uploads/13318959321.jpg"]http://www.astroupload.com/uploads/13318959321.jpg (http://www.astroupload.com/uploads/13318959321.jpg)



This is a good target for observers.Don't miss this opportunity

[هانیه امیری]

March 21 : Comet C/2009 P1 (Garradd) against the background stars of Ursa Major


Comet Garradd glows around7th magnitude as it comes near the Ursa Major. Garradd lies approximately halfway between Dubhe (Alpha [α] Ursae Majoris), and the galaxy M81



[/URL][URL="http://www.astroupload.com/uploads/13321609641.jpg"]http://www.astroupload.com/uploads/13321609641.jpg (http://www.astroupload.com/uploads/13321609641.jpg)


This part of the sky never sets from mid-northern latitudes
You need a binocular or a telescope to observe this comet

[هانیه امیری]

March 29: Sirius and M41 in the same field of view

This is a good week to look for Sirius in the evening sky. The night sky’s brightest star (at magnitude –1.5) appears in the southwest after twilight ends


[/URL][URL="http://www.astroupload.com/uploads/13330468851.jpg"]http://www.astroupload.com/uploads/13330468851.jpg (http://www.astroupload.com/uploads/13330468851.jpg)


If you point binoculars at Sirius, look for the pretty star cluster M41 in the same field of view, just 4° below the star

[هانیه امیری]

March 31: asteroid 6 Hebe near Mars

Tonight offers a good opportunity to track down the asteroid 6 Hebe through your telescope. The 10th-magnitude space rock lies approximately 7° north of Mars, but it is easier to find by one of Leo’s stars.


http://www.astroupload.com/uploads/13331094661.jpg (http://www.astroupload.com/uploads/13331094661.jpg)


Hebe stands 2° east of the fine double star Gamma (γ) Leonis, which shines at 2nd magnitude

[هانیه امیری]

April 5: Asteroid 6 Hebe near Leo

Tonight offers a good opportunity to track down the asteroid 6 Hebe through your telescope. The 10th-magnitude space rock lies approximately 7° north of Mars, but it is easier to find by scanning just over 1° east of the fine double star Gamma (γ) Leonis, which shines at 2nd magnitude


http://www.astroupload.com/uploads/13336080931.png (http://www.astroupload.com/uploads/13336080931.png).

[stargazer]

April 6 - Full Moon. The Moon will be directly opposite the Earth from the Sun and will be fully illuminated as seen from Earth.



April 15 - Saturn at Opposition. The ringed planet will be at its closest approach to Earth and its face will be fully illuminated by the Sun. This is the best time to view and photograph Saturn and its moons.


April 21 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 07:18 UTC.


April 21, 22 - Lyrids Meteor Shower. The Lyrids are an average shower, usually producing about 20 meteors per hour at their peak. These meteors can produce bright dust trails that last for several seconds. The shower usually peaks on April 21 & 22, although some meteors can be visible from April 16 - 25. With no moon to get in the way this year, this really should be a good show. Look for meteors radiating from the constellation of Lyra after midnight.


April 28 - Astronomy Day Part 1. Astronomy Day is an annual event intended to provide a means of interaction between the general public and various astronomy enthusiasts, groups and professionals. The theme of Astronomy Day is "Bringing Astronomy to the People" and on this day astronomy and stargazing clubs and other organizations around the world will plan special events. You can find out about special local events by contacting your local astronomy club or planetarium. You can also find more about Astronomy Day by checking the Web site for the Astronomical League (http://www.astroleague.org/al/astroday/astroday.html).

[هانیه امیری]

April 15 - Saturn at Opposition. The ringed planet will be at its closest approach to Earth and its face will be fully illuminated by the Sun. This is the best time to view and photograph Saturn and its moons.

.



April 15 - Saturn at Opposition


Saturn lies opposite the Sun in our sky tonight and reaches its peak visibility for 2012. The ringed planet appears low in the east as darkness falls and it climbs higher in the southeast


[/URL][URL="http://up.avastarco.com/images/k3bydfafet8uxnj106.png"]http://up.avastarco.com/images/k3bydfafet8uxnj106.png (http://up.avastarco.com/images/k3bydfafet8uxnj106.png)


Saturn lies among the background stars of Virgo, just 5° from Spica. The planet shines at magnitude 0.2, noticeably brighter than Spica

[هانیه امیری]

April 16: Winter Hexagon


Although the calendar may say it is spring, the so-called Winter Hexagon remains prominent on April evenings. One of the sky’s largest asterisms — a recognizable pattern of stars separate from a constellation’s form — the hexagon stands out in the western sky after darkness falls.


[/URL][URL="http://up.avastarco.com/images/41fyte7er00v45pesptd.png"]http://up.avastarco.com/images/41fyte7er00v45pesptd.png (http://up.avastarco.com/images/41fyte7er00v45pesptd.png)


To trace this asterism, start with southern Orion’s luminary, Rigel. The second stop is brilliant Sirius in Canis Major. Next, pick up Procyon in the faint constellation Canis Minor, then the twins Castor and Pollux in Gemini, followed by Capella in Auriga, Aldebaran in Taurus, and finally back to Rigel.

[هانیه امیری]

Sunday, April 22: Crescent Moon is near jupiter



Look to the western sky after sunset, and you’ll see a slender crescent Moon hanging just a few degrees under Jupiter. The pretty conjunction appears even more spectacular against the colorful background of twilight. Unfortunately jupiter will disappear in the Sun’s glare by the end of the month and won’t return to view until it climbs into the morning sky in June.




[/URL][URL="http://up.avastarco.com/images/0setxqum6dgyuyvm4x57.png"]http://up.avastarco.com/images/0setxqum6dgyuyvm4x57.png (http://up.avastarco.com/images/0setxqum6dgyuyvm4x57.png)




The Moon reaches apogee, the farthest point in its orbit around Earth. It then lies 406,419 kilometers from Earth’s center.

[هانیه امیری]

Wednesday, April 25: The position of Saturn in Virgo

Although Saturn reached its peak April 15, when it appeared opposite the Sun in our sky, our view of the ringed planet hardly diminishes this week. It remains on display all night among the background stars of Virgo, hanging in the southeastern sky as darkness falls and climbing high in the south by midnight local daylight time.


http://up.avastarco.com/images/gkmkfi8q0hjouthegfyr.png (http://up.avastarco.com/images/gkmkfi8q0hjouthegfyr.png)


Saturn continues to shine brightly, too, at magnitude 0.3. It appears noticeably brighter than Virgo’s brightest star, Spica, which lies 5° southwest of the planet.

[gandom]

in the cloudy sky of tehran,there will be no hope to observe this astronomical event!

[هانیه امیری]

in the cloudy sky of tehran,there will be no hope to observe this astronomical event!


dear gandom :)


Thanks for your attention. That's right , unfortunately big cities have other problems too. I hope we'll reduce the light pollution as soon as possible

[هانیه امیری]

Saturday, April 28: The position of Mars in Leo
Mars remains a conspicuous point of light among the background stars of Leo the Lion. It stands high in the south as darkness falls and doesn’t set until after 3 a.m. local daylight time. Shining at magnitude –0.1, it easily bests Leo’s brightest star, 1st-magnitude Regulus.


http://www.astroupload.com/uploads/13356307971.png (http://www.astroupload.com/uploads/13356307971.png)

[هانیه امیری]

Monday, April 30: The position of Venus in the western sky

Venus appears brilliant in the western sky starting about half an hour after sunset. It stands one-third of the way to the zenith 30 minutes after the Sun goes down and doesn’t set until nearly 11:30 p.m. local daylight time. Shining at magnitude –4.7, it appears slightly brighter today than at any other time during this evening apparition. (The difference is essentially imperceptible, however — it appears only a thousandth of a magnitude brighter today than it did yesterday or will tomorrow


http://up.avastarco.com/images/5179dvrc2oh63xxu84n8.png (http://up.avastarco.com/images/5179dvrc2oh63xxu84n8.png)

[هانیه امیری]

Wednesday, May 2: Hebe near Mars

This week offers a last chance to track down asteroid 6 Hebe through your telescope. The 11th-magnitude space rock lies 9° north of Mars, but it is easier to find by scanning about 1° east-northeast of the fine double star Gamma (γ) Leonis, which shines at 2nd magnitude



http://up.avastarco.com/images/dzchvnwo9pyzcoej583.png (http://up.avastarco.com/images/dzchvnwo9pyzcoej583.png)

[هانیه امیری]

Thursday, May 3: The posotion of Saturn in Virgo

Saturn reached its peak when it appeared opposite the Sun in our sky April 15, but our view of the ringed planet remains spectacular. It is on display all night among the background stars of Virgo, hanging in the southeastern sky as darkness falls and climbing high in the south by midnight local daylight time. Saturn continues to shine brightly, too, at magnitude 0.3. It appears brighter than Virgo’s brightest star, Spica, which lies 5° southwest of the planet


http://up.avastarco.com/images/b2x5pl3sgspi3bbk5g8j.png (http://up.avastarco.com/images/b2x5pl3sgspi3bbk5g8j.png)

[هانیه امیری]

Friday, May 4: Eta Aquarid meteor shower

The annual Eta Aquarid meteor shower peaks tomorrow morning. Unfortunately, Full Moon arrives May 5, and its bright light will wash out fainter meteors and render the brighter ones less impressive. Don’t give up hope, however. The shower’s radiant — the point from which the meteors appear to emanate — rises in the east around 3 a.m. local daylight time. With the Moon then in the western sky, position yourself where buildings or trees block its light. The Eta Aquarid shower derives from bits of debris ejected by Comet 1P/Halley during its many trips around the Sun


http://up.avastarco.com/images/k60f209r77zk4j4bsrkw.png (http://up.avastarco.com/images/k60f209r77zk4j4bsrkw.png)



Usually, the days before and after maximum offer observers with access to a dark observing site up to 30 meteors per hour. This number jumps to 60 per hour at the shower’s peak the morning of May 5.

.

[هانیه امیری]

Monday, May 7: The position of Mars in Leo

Mars remains prominent among the background stars of Leo the Lion. It stands high in the south as darkness falls and doesn’t set until after 3 a.m. local daylight time. Shining at magnitude 0.1, it easily bests Leo’s brightest star, 1st-magnitude Regulus. Also note the stark color contrast between ruddy Mars and blue-white Regulus.


[/URL][URL="http://up.avastarco.com/images/wopzs8hkuh0r2fktazy.png"]http://up.avastarco.com/images/wopzs8hkuh0r2fktazy.png (http://up.avastarco.com/images/wopzs8hkuh0r2fktazy.png)

[هانیه امیری]

Tonight's event is about a deep sky object. To hunt this object all you need to enjoy this gem is a dark sky and two eyes

Do you feel in the mood for a nice springtime galaxy? With binoculars in hand, scan the border between Hydra and Centaurus, about two-thirds of the way from 3rd-magnitude Gamma (γ) Hydrae to 4th-magnitude 1 Centauri. Spiral galaxy M83 shows a bright stellar nucleus surrounded by the soft glow of its broad spiral arms. For observers at 40° north latitude, M83 climbs 20° above the southern horizon around 1 a.m. local daylight time


[/URL]http://up.avastarco.com/images/ituaaboky19kutqzn8r.png (http://up.avastarco.com/images/ituaaboky19kutqzn8r.png)


This is the image of M83 galaxy


[URL="http://up.avastarco.com/images/zz5txwo744t8xk8xefzv.jpg"]http://up.avastarco.com/images/zz5txwo744t8xk8xefzv.jpg (http://up.avastarco.com/images/zz5txwo744t8xk8xefzv.jpg)

[هانیه امیری]

Wednesday, May 9:The posotion of Saturn in Virgo

Although Saturn reached its peak nearly a month ago when it appeared opposite the Sun in our sky, our view of the ringed planet remains spectacular. It is on display all night among the background stars of Virgo, hanging in the southeastern sky as darkness falls and climbing high in the south by 11 p.m. local daylight time. Saturn continues to shine brightly, too, at magnitude 0.4. It appears noticeably brighter than Virgo’s brightest star, Spica, which lies 5° south-southwest of the planet


[/URL][URL="http://up.avastarco.com/images/9ehf4x5vl458wuf0iy8d.png"]http://up.avastarco.com/images/9ehf4x5vl458wuf0iy8d.png (http://up.avastarco.com/images/9ehf4x5vl458wuf0iy8d.png)

.

[هانیه امیری]

Thursday, May 10: Comet Garradd near spiral galaxy NGC 2683

Comet C/2009 P1 (Garradd) currently glows around 8th magnitude among the background stars of southeastern Lynx. Although this constellation features no star brighter than 3rd magnitude, the region is easy to locate south of the front legs of Ursa Major the Great Bear. This evening, Garradd provides a bonus because it passes less than 1° west of the nearly edge-on spiral galaxy NGC 2683. You’ll need a telescope for good views of the comet and galaxy


http://up.avastarco.com/images/xf3hrbxe3jlszgo8udx7.png (http://up.avastarco.com/images/xf3hrbxe3jlszgo8udx7.png)

[هانیه امیری]

Friday, May 11: The Big Dipper lies nearly overhead

The Big Dipper’s familiar shape lies nearly overhead on May evenings. The spring sky’s finest binocular double star marks the bend of the Dipper’s handle. Mizar shines at 2nd magnitude, some six times brighter than its 4th-magnitude companion, Alcor. Although these two are not physically related, they make a fine sight through binoculars. (People with good eyesight often can split the pair without optical aid.) A small telescope reveals Mizar itself as double — and these components do orbit each other


[/URL][URL="http://up.avastarco.com/images/s9zln89agbb4jn70bs75.png"]http://up.avastarco.com/images/s9zln89agbb4jn70bs75.png (http://up.avastarco.com/images/s9zln89agbb4jn70bs75.png)

.

[هانیه امیری]

Saturday, May 12: Asteroid 5 Astraea near Leo

Look two-thirds of the way from the southern horizon to the zenith, and you’ll see the familiar shape of Leo the Lion. The constellation forms a perfect backdrop for locating the 11th-magnitude asteroid 5 Astraea. First, find the 4th-magnitude star Iota (ι) Leonis, which lies just below the Lion’s hindquarters. Then, insert a low-power eyepiece and go asteroid hunting.

Astraea lies 0.5° south-southwest of Iota this evening; tomorrow night, the main-belt asteroid appears a similar distance due south of the star. If you are unsure which point of light is Astraea, sketch the field and return to it a night or two later. The object that moved is the asteroid


[/URL][URL="http://up.avastarco.com/images/n7wwhiqtz5fktmkqfhuf.png"]http://up.avastarco.com/images/n7wwhiqtz5fktmkqfhuf.png (http://up.avastarco.com/images/n7wwhiqtz5fktmkqfhuf.png)

[هانیه امیری]

Tuesday, May 15 : The posotion of Saturn in Virgo

Saturn looks spectacular all this week. It lies among the background stars of Virgo, hanging in the southeastern sky as darkness falls and climbing high in the south by 11 p.m. local daylight time. Saturn shines at magnitude 0.4, noticeably brighter than Virgo’s brightest star, Spica, which lies 5° south-southwest of the planet


http://up.avastarco.com/images/ydj0vbpyorywhhwzqu.png (http://up.avastarco.com/images/ydj0vbpyorywhhwzqu.png)

[هانیه امیری]

Would you like to hunt down a galaxy? With binoculars in hand, scan about one field of view east-southeast of 2nd-magnitude Phecda (Gamma [γ] Ursae Majoris), the star that forms the southeastern corner of the Big Dipper’s bowl. You should see a triangle of 5th- and 6th-magnitude stars. The spiral galaxy M106 lies 1.7° south of 3 Canum Venaticorum, the triangle’s southern tip. The galaxy will appear as an oval blur of light


http://up.avastarco.com/images/b6mh3rj0prv1ua95insa.png (http://up.avastarco.com/images/b6mh3rj0prv1ua95insa.png)


This is the image of M106 galaxy


http://up.avastarco.com/images/b3ky17y8lizq9u65zc.jpg (http://up.avastarco.com/images/b3ky17y8lizq9u65zc.jpg)

[هانیه امیری]

Saturday, May 19: The Moon reaches apogee

The Moon reaches apogee, the farthest point in its orbit around Earth, at 12:13 p.m. EDT. It then lies 252,555 miles (406,448 kilometers) from Earth’s center.

The position of Venus in the western sky

Venus is moving lower in the west every evening as twilight fades. It's now left of much fainter Beta Tauri, which has been descending almost in parallel with it


http://up.avastarco.com/images/w5iwaqeihwpjhn9ljhmt.png (http://up.avastarco.com/images/w5iwaqeihwpjhn9ljhmt.png).

[هانیه امیری]

The Spring Triangle shines high in the sky as darkness falls. This triplet of stars is an example of an asterism — a recognizable star pattern that’s not one of the official constellations. The most famous asterism is the Big Dipper, seven bright stars within the constellation Ursa Major the Great Bear. But asterisms also can incorporate stars from different constellations. The Spring Triangle, for example, uses the brightest stars from three of this season’s heavenly figures. The most prominent of the three luminaries is Arcturus, the numero uno starin Boötes the Herdsman. Arcturus ranks number four in star brightness overall and it’s the brightest star north of the celestial equator, the imaginary line that divides the northern part of the sky from the southern half. About one-sixth of the way across the sky to the south-southwest of Arcturus lies Spica, the sky’s 15th-brightest star and number one in Virgo the Maiden. And at the westernmost tip of the Spring Triangle lies Denebola, the second-brightest star in Leo the Lion and the one marking the Lion’s tail


[/URL][URL="http://up.avastarco.com/images/o9ko7yvc3x9hef590uj.png"]http://up.avastarco.com/images/o9ko7yvc3x9hef590uj.png (http://up.avastarco.com/images/o9ko7yvc3x9hef590uj.png).

[هانیه امیری]

Wednesday, May 23: Observe the Neptune

Get up early to target Neptune. Our solar system’s most distant planet rises in the southeast a bit before 2 A.M. local time, and an hour later it stands high enough to be worth trying to find.


http://up.avastarco.com/images/k33vjjj8m6bt3vpj25jx.png (http://up.avastarco.com/images/k33vjjj8m6bt3vpj25jx.png)


Rather than searching for Neptune directly, first find two stars: magnitude 4.8 Sigma (σ) Aquarii and 38 Aquarii, which shines at magnitude 5.4. This pair lies exactly 5° apart. Neptune this morning lies between them and equidistant from both. The planet will be fainter, at magnitude 7.9, but binoculars (along with Neptune’s blue color) will let you spot it easily



http://up.avastarco.com/images/jlydzsu5urrsymoc5twm.png (http://up.avastarco.com/images/jlydzsu5urrsymoc5twm.png).

[هانیه امیری]

Friday, June 1 : Target the asteroid 18 Melpomene

Tonight offers a good opportunity to track down the asteroid 18 Melpomene through your telescope. This 10th-magnitude space rock lies less than ½° west of the 4th-magnitude star Alpha (α) Scuti. This region rises shortly after 9 p.m. local daylight time and climbs highest in the south around 3 a.m. Try to find Melpomene either tonight or tomorrow night (when it lies a bit farther from Alpha Scuti); later in the week, a nearly Full Moon will make the task harder


http://up.avastarco.com/images/kdmx5y6tgf6fq3cg5e1m.png (http://up.avastarco.com/images/kdmx5y6tgf6fq3cg5e1m.png)

[هانیه امیری]

If you head outside as darkness falls and look halfway from the southern horizon to the zenith, two bright objects will vie for your attention. The upper one is Saturn. It appears slightly brighter, at magnitude 0.5, than its neighbor and has a yellowish cast. Some 5° below the ringed planet resides blue-white Spica, the magnitude 1.0 luminary of the constellation Virgo.


[/URL]http://up.avastarco.com/images/us9768j421ls81atuxa.png (http://up.avastarco.com/images/us9768j421ls81atuxa.png)



Sunday, June 3 : The Moon reaches perigee

The Moon reaches perigee, the closest point in its orbit around Earth, at 9:16 a.m. EDT. It then lies 222,752 miles (358,484 kilometers) away from us. Because perigee arrives less than 24 hours before Full Moon, residents of coastal areas should expect higher than normal tides for a few days


[URL="http://up.avastarco.com/images/uoobnqkqdtb6ijzrt7iz.png"]http://up.avastarco.com/images/uoobnqkqdtb6ijzrt7iz.png (http://up.avastarco.com/images/uoobnqkqdtb6ijzrt7iz.png)


.

[هانیه امیری]

Monday, June 4: Full Moon

Full Moon occurs at 7:12 a.m. EDT. This isn’t just any Full Moon, however — from more than half of Earth’s surface, observers can watch a partial lunar eclipse as the Moon passes through Earth’s shadow. People will see the shadow take its first bite from the Moon at 6:00 a.m. EDT (3:00 a.m. PDT). Although this comes after the Moon sets in northeastern North America, everyone else on the continent can witness at least part of the event. Maximum eclipse comes at 4:04 a.m. PDT, when 37 percent of the Moon lies within the dark shadow. Skywatchers across the Pacific Ocean to Australia and eastern Asia also will see the eclipse. .


http://www.astroupload.com/uploads/13388340201.png (http://www.astroupload.com/uploads/13388340201.png)

[هانیه امیری]

June 5 & 6: The last Venus Transit in our life

For the second and final time this century, Venus passes in front of the Sun from our perspective. Residents of North America will see the transit this afternoon, but the calendar will read June 6 for those in the Eastern Hemisphere. Venus appears just 3 percent as large as the Sun and will look like a black dot as it traverses the Sun’s face. Be sure to look through a safe solar filter to protect your eyes — the Sun’s rays can damage your retinas quickly and painlessly


[/URL][URL="http://www.astronomy.com/%7E/media/Images/News%20and%20Observing/Sky%20this%20Month/2012/06/Venus-transit_Winder.ashx?la=en&mw=900&mh=650"]http://www.astronomy.com/%7E/media/Images/News%20and%20Observing/Sky%20this%20Month/2012/06/Venus-transit_Winder.ashx?la=en&mw=900&mh=650 (http://www.astronomy.com/%7E/media/Images/News%20and%20Observing/Sky%20this%20Month/2012/06/Venus-transit_Winder.ashx?la=en&mw=900&mh=650)

Photo by George Winder

[هانیه امیری]

Friday, June 8:
The position of Jupiter in the sky

You should be able to glimpse Jupiter in the predawn sky late this week. The giant planet lies 5° high in the east-northeast 30 minutes before sunrise this morning and gains a little altitude with each new day. Jupiter shines at magnitude –2.0, which makes it plenty bright enough to see against the twilight glow


http://up.avastarco.com/images/zzf1bm8yfpytaqxhm11f.png (http://up.avastarco.com/images/zzf1bm8yfpytaqxhm11f.png)


The position of Mercury in the sky

Mercury returns to the evening sky during June’s second week. This evening, it shines at magnitude –1.0 and appears 6° high in the west-northwest 30 minutes after sunset. If you have trouble finding the innermost planet with your naked eyes, sweep just above the horizon with binoculars


http://up.avastarco.com/images/7piju9rdoorops1rqahw.png (http://up.avastarco.com/images/7piju9rdoorops1rqahw.png)..

[هانیه امیری]

Monday, June 18

You’ll want to get up early this morning to witness a beautiful twilight gathering: A waning crescent Moon joins the brilliant planetary duo of Venus and Jupiter. The scene will be stunning with naked eyes or binoculars, but the extra light-gathering ability of binocs also should reveal the Pleiades star cluster (M45) some 5° above Jupiter


http://up.avastarco.com/images/z69l04uxgn74knbp7ba.png (http://up.avastarco.com/images/z69l04uxgn74knbp7ba.png)

[stargazer]

4403

see this video:

http://hubblesite.org/explore_astronomy/tonights_sky/


Wednesday, June 27, 2012
The waxing gibbous Moon is to the lower right of the star Spica. Saturn is less than 5 degrees above Spica. Look for the Moon in the southwest sky an hour after sunset.

[stargazer]

See all five visible planets in early July 2012





[/URL]http://en.es-static.us/upl/2012/07/12July01_430.jpg (http://en.es-static.us/upl/2012/07/12July01_430.jpg)


Tonight is Jul 01, 2012

http://tycho.usno.navy.mil/cgi-bin/phase.gif (http://tycho.usno.navy.mil/cgi-bin/phase.gif)

Courtesy U.S. Naval Observatory


You can see five visible planets in early July 2012. Mercury, Venus, Mars, Jupiter and Saturn

Three of the five visible planets – Mercury, Mars and Saturn – pop out into the western part of the sky as dusk ebbs into darkness. The other two – Jupiter and Venus – beam in the east during the wee hours before sunrise.





Here’s how to locate the evening planets. They are Mercury, Mars and Saturn. Look in the west, around 45 to an hour minutes after sunset. You need to look that early, or you’ll miss Mercury, which sets soon after the sun. Mercury, the innermost planet, sets about 90 minutes after the sun at mid-northern latitudes.



So Mercury is closest to the sunset point. Mars is next highest in the sky. Saturn is higher up than Mars. This line-up holds true across Earth, in both the Northern and Southern Hemispheres. Our featured chart at top of this post shows the ecliptic (http://earthsky.org/astronomy-essentials/what-is-the-ecliptic)– the Earth’s orbital plane projected onto the sphere of stars. Because Earth and all the other planets orbit the sun on nearly the same plane, the planets are always found on or near the ecliptic. As seen from Earth, the ecliptic also delineates the sun’s yearly path in front of the backdrop stars.



http://en.es-static.us/upl/2012/07/12July01_300t.jpg (http://en.es-static.us/upl/2012/07/12July01_300t.jpg)
Venus and Jupiter beam in the east before sunrise all through July


Here’s how to locate the two morning planets. There’s really no problem here. You can’t miss Jupiter and Venus in eastern predawn sky, assuming your sky is clear. They’re the two most brilliant starlike objects in all the heavens, with Venus being the brighter of these two dazzling beauties. Venus is also closer to the predawn horizon. You’ll see Venus and Jupiter gracing July early dawns all month long. In mid-July 2012, the moon will sweep into this part of the sky, providing [U]some wonderful early morning sky scenes and great photo opportunities.

From: Earthsky

[Saeed Jafari]

September 2012






http://hubblesite.org/explore_astronomy/tonights_sky/

[stargazer]

September 2012: Northern Edition-PDF

4796

http://www.skymaps.com/skymaps/tesmn1209.pdf

Sky Calender links

http://www.skymaps.com/articles/n1209.html

From:Skymaps

[هانیه امیری]

Thursday, November 1 :Conjunction of moon and jupiter
The waning gibbous Moon rises just minutes after brilliant Jupiter this evening, and the two cross the sky together all night.
The pair lies among the background stars of central Taurus .



http://up.avastarco.com/images/5i7mxxvx4tyztoe17j0w.png (http://up.avastarco.com/images/5i7mxxvx4tyztoe17j0w.png)


Although they look close together, Jupiter is 1,500 times farther away. Aldebaran, to their right, is 930,000 times more distant than Jupiter!

[gissoo]

Moon, Venus and Mercury low in west after sunset June 10 (http://earthsky.org/tonight/moon-venus-and-mercury-low-in-west-after-sunset-june-10)


By Bruce McClure (http://earthsky.org/team/brucemcclure) in Tonight | Jun 10, 2013


[/URL][URL="http://en.es-static.us/upl/2013/06/13june10_430.jpg"]http://en.es-static.us/upl/2013/06/13june10_430.jpg (http://en.es-static.us/upl/2013/06/13june10_430.jpg)The young waxing crescent moon pairs up with the planets Mercury and Venus after sunset June 10 (http://earthsky.org/tonight/moon-venus-and-mercury-low-in-west-after-sunset-june-10).



The first two celestial objects to pop out after sunset on June 10 are the moon and the dazzling planet Venus. That’s because the moon and Venus rank as the second-brightest and third-brightest heavenly bodies, respectively, after the sun. Look for them to shine low in the west-northwest (over the sunset point on the horizon) some 30 minutes after sunset. Then watch for the fainter planet Mercury to shine over Venus about 45 to 60 minutes after sundown.

[gissoo]

Find Summer Triangle ascending in the east on June evenings

[/URL][URL="http://en.es-static.us/upl/2009/06/09jun10_430.jpg"]http://en.es-static.us/upl/2009/06/09jun10_430.jpg (http://en.es-static.us/upl/2009/06/09jun10_430.jpg)


It’s almost the solstice. Here in the Northern Hemisphere, the days are long, the sun is at its most intense for the year, and the weather is warm – but not as warm as it will be later this summer. And the summer sky is with us, too. The famous asterism known as the Summer Triangle is now ascending in the eastern sky on these June evenings.
Everything you need to know: June solstice 2013 (http://earthsky.org/astronomy-essentials/everything-you-need-to-know-june-solstice-2012)
Gallery: The solstice as seen from Stonehenge (http://earthsky.org/human-world/gallery-the-solstice-as-seen-from-stonehenge)

The Summer Triangle is not a constellation. Instead, this pattern consists of three bright stars in three separate constellations – Deneb in the constellation Cygnus the Swan, Vega in the constellation Lyra the Harp, and Altair in the constellation Aquila the Eagle.

Learn to recognize the Summer Triangle asterism now, and you can watch it all summer as it shifts higher in the east, then finally appears high overhead in the late northern summer and early northern autumn sky.

How can you learn to recognize it? First, just go outside in early evening, face east, and try to notice three particularly bright stars. Those stars will probably be Vega (http://earthsky.org/tonightpost/brightest-stars/vega-brilliant-blue-white-is-third-brightest-star), Deneb (http://earthsky.org/tonightpost/brightest-stars/deneb-among-the-farthest-stars-to-be-seen) and Altair (http://earthsky.org/tonightpost/brightest-stars/altair-the-bluish-jewel-of-the-eagle).

An asterism isn’t the same thing as a constellation, by the way. Constellations generally come to us from ancient times. In the 1930′s, the boundaries of 88 constellations were officially drawn by the International Astronomical Union (http://www.iau.org/).

On the other hand, asterisms are whatever you want them to be. They’re just patterns on the sky’s dome. You can also make up your own asterisms, in much the same way you can recognize shapes in puffy clouds on a summer day.

But some asterisms are so obvious that they’re recognized around the world. The Summer Triangle – a large triangular pattern consisting of three bright stars in three different constellations – is one of these. The Summer Triangle appears in the east at nightfall on June evenings, swings high overhead in the wee hours after midnight and sits rather high in the west at daybreak

(http://earthsky.org/team/deborahbyrd)

[gissoo]

Most “super” supermoon of 2013 on June 22-23


[/URL]http://en.es-static.us/upl/2012/05/full_moon_640.jpg (http://en.es-static.us/upl/2012/05/full_moon_640.jpg)
Tonight for June 22, 2013

[URL="http://tycho.usno.navy.mil/cgi-bin/phase.gif"]http://tycho.usno.navy.mil/cgi-bin/phase.gif (http://tycho.usno.navy.mil/cgi-bin/phase.gif) Courtesy U.S. Naval Observatory


For many countries, the moon appears about as full in the June 22 evening sky as it does on the evening of June 23. This full moon is not only the closest and largest full moon of the year. It also presents the moon’s closest encounter with Earth for all of 2013. The moon will not be so close again until August, 2014. In other words, it’s not just a supermoon. It’s the closest supermoon of 2013.
We astronomers call this sort of close full moon a perigee full moon. The word perigee describes the moon’s closest point to Earth for a given month. Two years ago, when the closest and largest full moon fell on March 19, 2011, many used the term supermoon, which we’d never heard before. Last year, we heard this term again to describe the year’s closest full moon on May 6, 2012. Now the term supermoon is being used a lot. Last month’s full moon – May 24-25, 2013 (http://linkclk.com/adfly/goto.php?i=%7BC2923666-2C66-4722-8246-21D49FD4CC04%7D&lm=1371929144632&url=http%3A%2F%2Fearthsky.org%2Ftonight%2Ffull-flower-moon-shines-from-dusk-till-dawn-on-may-2425) – was also a supermoon. But the June full moon is even more super! In other words, the time of full moon falls even closer to the time of perigee, the moon’s closest point to Earth. The crest of the moon’s full phase in June 2013, and perigee, fall within an hour of each other.