Explore Spitzer Space Telescope, Nasa Photos, and more!

These images from NASA's Spitzer Space Telescope of Comet ISON were taken on June 13, 2013, when ISON was 312 million miles (502 million kilometers) from the sun. The lefthand image shows a tail of fine rocky dust issuing from the comet, blown back by the pressure of sunlight. The image at right shows a neutral gas atmosphere surrounding ISON, likely created by carbon dioxide fizzing off the comet at a rate of 2.2 million pounds per day.

NASA Photos Show Outburst from Potential 'Comet of the Century'

Infographic: Facts about the hot blue gas giant planet HD 189733b.

Images: Blue Alien Planet's True Color Revealed by Hubble

Astrophotographer Steven Loy sent in this photo of comet Pan-STARRS and the moon taken from Windy Hill on Highway 35 (Skyline Blvd.) above Woodside, CA, on March 12, 2013.

Astrophotographer Steven Loy sent in this photo of comet Pan-STARRS and the moon taken from Windy Hill on Highway 35 (Skyline Blvd.) above Woodside, CA, on March

Comet Pan-STARRS Seen in Buenos AiresCredit: © Luis Argerich/Nightscape PhotographyAstrophotographer Luis Argerich of Buenos Aires, Argentina, took this photo of Comet Pan-STARRS taken on March 2, 2013. He writes: "While the tail was still short it was easy to see with the naked eye and very bright."

Comet ,Luis Argerich of Buenos Aires, Argentina, took this photo of Comet Pan-STARRS taken on March He writes: "While the tail was still short it was easy to see with the naked eye and very bright.

The farthest cosmic lens yet found, a massive elliptical galaxy, is shown in the inset image at left. The galaxy existed 9.6 billion years ago and belongs to the galaxy cluster, IRC 0218.

Hubble Shows Farthest Lensing Galaxy Yields Clues to Early Universe

Astronomers using NASA's Hubble Space Telescope have unexpectedly discovered the most distant galaxy that acts as a cosmic magnifying glass. Seen here as it looked billion years ago, this monster elliptical galaxy breaks .

Perspective in space.

Perspective in space.

Perspective in space proportions - just when you thought you knew how vast the universe was./ Cosmos / Universo / Milki Way Galaxy / Earth / Solar System / Universe / Galactic

Hubble Telescope Spies Huge Explosion on Faraway Star NASAs Hubble Space Telescope has given astronomers a rare look at an enormous stellar eruption, allowing them to map out the aftermath of such blasts in unprecedented detail.

Hubble photographed an April 2011 explosion in the double-star system T Pyxidis (T Pyx for short), which goes off every 12 to 50 years

Sun., Sept. 22, 4:44 p.m. EDT. The sun crosses the celestial equator moving from north to south, heralding the beginning of autumn in the northern hemisphere. Credit: Starry Night Software View full size image

Equinox Explained: Why Earth's Seasons Will Change on Sunday --- The sun crosses the celestial equator on September 22 at p. On this date the sun rises due east and sets due west, and the day and night are of equal length.

Comet Panstarrs at Burns Beach in northern metropolitan area in Perth, Western Australia. Rocks off the coast with birds and a small fishing boat. One hour after sunset in early March. Photo by EarthSky Facebook friend Michael Goh.

Comet Panstarrs March 2013 - currently watching it in Texas :)

Astrophotographer Douglas S. Brown sent in a photo of Comet Pan-STARRS taken on March 13, 2013, from Mt. Woodson, just east of San Diego.

Bright Lights, Big Comet: Astrophotographer Douglas S. Brown sent in a photo of Comet Pan-STARRS taken on March from Mt. Woodson, just east of San Diego, shooting over the Pacific Ocean.

Images of the Sun from Space taken by NASA’s Solar Dynamics Observatory, Solar Flares | Coronas, Solar Tsunami

The SOHO spacecraft watched as a fairly bright comet dove towards the sun in a white streak and was not seen again after its close encounter (May

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Photo: Hubble telescope spots ‘UFO galaxy’

This image, taken by NASA’s Hubble Space Telescope, is a very thin section of a supernova remnant caused by a stellar explosion that occurred more than years ago.  Image credit: Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)

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This image of was taken by the Canada-France-Hawaii Telescope atop Mauna Kea. Photo by CFHT / Coelum / Jean-Charles Cuillandre

Comet ISON streaks across space in this series of images from Feb. 4, March 4, April 3 and May 4, 2013. ISON is currently about 455 million to 360 million miles (730-580 million kilometers) from the sun, but it's headed toward Earth's star. On Nov. 28, 2013, the comet will graze the sun in one of the closest passes ever recorded for any comet, moving within 800,000 miles of the star. Before the close encounter  the comet should be visible from Earth, possibly even in daylight.

Amazing Images: The Best Science Photos of the Week

Images of Comet ISON obtained using the Gemini Multi-Object Spectrograph at Gemini North on February March April and May 2013 (left to right, respectively; Comet ISON at center in all images).

universe - Collections - The “Black Widow” pulsar is moving through the galaxy at a speed of almost a million kilometers per hour. A bow shock wave due to this motion is visible to optical telescopes, shown in this image as the greenish crescent shape. The pressure behind the bow shock creates a second shock wave that sweeps the cloud of high-energy particles back from the pulsar to form the cocoon.

The “Black Widow” pulsar moves at a speed of KM/hr. A bow shock wave is the greenish crescent shape. The pressure behind the bow shock creates a second shock wave that sweeps the cloud of high-energy particles back from the pulsar to form the cocoon.

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