The Helix Nebula, also known as the "Eye of God".

The Helix Nebula, also known as the "Eye of God".

On Tuesday, Scott J. Kelly is scheduled to return from the International Space Station, completing the longest stay in space for a NASA astronaut. (Photo: NASA)

Scott Kelly’s Year in Space

On Tuesday, Scott J. Kelly is scheduled to return from the International Space Station, completing the longest stay in space for a NASA astronaut. (Photo: NASA)

In 1054 AD, Chinese astronomers were startled by the appearance of a new star, so bright it could be seen in broad daylight for several weeks. Today, the Crab Nebula is what's left of the supernova explosion they witnessed.

In 1054 AD, Chinese astronomers were startled by the appearance of a new star, so bright it could be seen in broad daylight for several weeks. Today, the Crab Nebula is what's left of the supernova explosion they witnessed.

NGC 7635: The Bubble Nebula

NGC 7635: The Bubble Nebula

Carina nebula mountaintop. A wall of space images could be amazing.

Carina nebula mountaintop. A wall of space images could be amazing.

A Cosmic Holiday Ornament, Hubble-Style by NASA Goddard Photo and Video, via Flickr

A Cosmic Holiday Ornament, Hubble-Style by NASA Goddard Photo and Video, via Flickr

man, stuck in infinity. the abyss.

man, stuck in infinity. the abyss.

From deep space nature's irridescent palette of radiance! —

From deep space nature's irridescent palette of radiance! —

Nebula Images: http://ift.tt/20imGKa Astronomy articles:...  Nebula Images: http://ift.tt/20imGKa  Astronomy articles: http://ift.tt/1K6mRR4  nebula nebulae astronomy space nasa hubble telescope kepler telescope stars apod http://ift.tt/2gi9mUR

Nebula Images: http://ift.tt/20imGKa Astronomy articles:... Nebula Images: http://ift.tt/20imGKa Astronomy articles: http://ift.tt/1K6mRR4 nebula nebulae astronomy space nasa hubble telescope kepler telescope stars apod http://ift.tt/2gi9mUR

Cosmic dust unveils birthplace of stars in the Orion constellation

Cosmic dust unveils birthplace of stars in the Orion constellation

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