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A composite image combining observations from x-ray and optical telescopes shows the bizarre "cosmic train wreck" of Abell 520, the result of a massive galactic collision.

MY MOST FAV: The photograph attached was taken by the crew on board the Columbia during its last mission, on a cloudless day. The picture is of Europe and Africa when the sun is setting. Half of the picture is in night. The bright dots you see are the cities' lights. The top part of Africa is the Sahara Desert . Note that the lights are already on in Holland , Paris , and Barcelona, and that's it's still daylight in Dublin , London , Lisbon , and Madrid . The sun is still shining ...

A time-lapse taken from the front of the International Space Station as it orbits our planet at night. This movie begins over the Pacific Ocean and continues over North and South America before entering daylight near Antarctica.

Don't ever stop taking pictures NASA.

Free Flying (by NASA Goddard Photo and Video) Mission Specialist Bruce McCandless II, is seen further away from the confines and safety of his ship than any previous astronaut has ever been. This space first was made possible by the Manned Manuevering Unit or MMU, a nitrogen jet propelled backpack. After a series of test maneuvers inside and above Challenger’s payload bay, McCandless went “free-flying” to a distance of 320 feet away from the Orbiter. This stunning orbital panorama view shows...

On August 7, 2003, the NASA Aqua MODIS instrument acquired this image of Ireland on the first day that summer that most of the island wasn't completely obscured by cloud cover.

Sunrise On Saturday, Aug. 27, 2011, International Space Station astronaut Ron Garan used a high definition camera to film one of the sixteen sunrises astronauts see each day. This image shows the rising sun as the station flew along a path between Rio de Janeiro, Brazil and Buenos Aires, Argentina. Image Credit: NASA

When it collides with the Earth’s magnetic field, it will cause radioactive disruptions. Those disruptions, NASA warns, could affect high-frequency communications, interfere with GPS satellites, and could also potentially disrupt power grids. It should also create some stunning aurorae that might be visible in places that normally don’t get them.

NASA recently released imagery showing the deforestation of America, in just 34 years.

NASA; Planetary Nebula

Russia's Bezymianny Volcano covers the icy landscape in ash in a false-color picture taken by a NASA satellite on April 22. The volcano starting erupting on April 14, spewing ash as high as 25,000 feet (7,600 meters). In the image, ash and bare rock appear gray while snow and ice are tinged with blue. A red "hot spot" shows where fresh lava is likely emerging from the volcano's dome, and a larger region to the southeast marks an active lava flow.

Krásní snímek kráteru Vibidia na Vestě, který pořídila sonda Dawn na její oběžné dráze. Kráter má průměr zhruba 10 km a je na něm vidět jasně slabá paprsková struktura s tmavým a světlým materiálem. Snímek byl pořízen ze vzdálenosti 700 km od povrchu a má rozlišení kolem 70 m na pixel. Credit: NASA/ JPL-Caltech/ UCLA/ MPS/ DLR/ IDA

Nile River Delta at night via NASA

NASA image of the Tarantula Nebula

from NASA

Oceans Under Jupiter's Callisto? (Jul 31 2001) Credit: Voyager 1, NASA Why does Jupiter's moon Callisto alter the magnetic field of Jupiter in its vicinity? Callisto itself does not have a strong magnetic field. One possible answer is that Callisto harbors sub-surface oceans of electrically conducting salt-water. This hypothesis was bolstered recently by a new analysis of how Callisto creates and dissipates heat.

FREE Sun-Earth Day Kit from NASA on www.icravefreebie...

NASA Image - This image of Earth’s city lights was created with data from the Defense Meteorological Satellite Program (DMSP) Operational Linescan System (OLS). Originally designed to view clouds by moonlight, the OLS is also used to map the locations of permanent lights on the Earth’s surface.

Europe by NASA

"Eyes on the Solar System" is a 3-D environment full of real NASA mission data. Explore the cosmos from your computer. Hop on an asteroid. Fly with NASA's Voyager 2 spacecraft. See the entire solar system moving in real time. It's up to you. You control space and time

Europe by NASA

Whole earth NASA photos of Hurricane Irene. Go look at the big one, it is worth checking out.

This is a unique NASA/ESA Hubble Space Telescope view of the disk galaxy NGC 5866 tilted nearly edge-on to our line-of-sight. Hubble's sharp vision reveals a crisp dust lane dividing the galaxy into two halves. The image highlights the galaxy's structure: a subtle, reddish bulge surrounding a bright nucleus, a blue disk of stars running parallel to the dust lane, and a transparent outer halo. Some faint, wispy trails of dust can be seen meandering away from the disk of the galaxy out into t...

The Aurora Australis is seen in this handout picture taken by Dutch astronaut Andre Kuipers on board the International Space Station between Antarctica and Australia March 10, 2012. [REUTERS/Andre Kuipers/ESA/NASA/Handout]