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)

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.

Portion of the M8 Lagoon Nebula

Portion of the M8 Lagoon Nebula

Possible section of the Rosette Nebula?... Nebula of Stars and Colorful Gas - Long, Tall, Vertical Pins

Possible section of the Rosette Nebula?... Nebula of Stars and Colorful Gas - Long, Tall, Vertical Pins

For more amazing images and posts about how Astronomy is Awesome, check us out! http://astronomyisawesome.com/ As always, please feel free to ask questions and we love it when you reblog! #astronomy...

For more amazing images and posts about how Astronomy is Awesome, check us out! http://astronomyisawesome.com/ As always, please feel free to ask questions and we love it when you reblog! #astronomy...

Nebulosa del cangrejo. 6500 años luz en nuestra galaxia, aún cerca.

Nebulosa del cangrejo. 6500 años luz en nuestra galaxia, aún cerca.

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/2hk86QR

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/2hk86QR

Orion Nebula. Highlights of Messier 78: a reflection nebul

Orion Nebula. Highlights of Messier 78: a reflection nebul

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