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Geneviève de Messières

The explosive death of a star created this debris cloud, Cassiopeia A, still expanding at shock-wave speeds. This photograph combines an optical image taken by Ken Crawford of the Rancho Del Sol Observatory and X-ray images from NASA's orbiting X-ray telescope NuSTAR, the first telescope to create focused images of high-energy X-rays. Via apod.nasa.gov.

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Cas A: Optical and X-ray

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The remains of a supernova

See Explanation. Clicking on the picture will download the highest resolution version available.

See Explanation. Clicking on the picture will download the highest resolution version available.

IC 1340 is the eastern segment of the Veil Nebula, itself also called the Cygnus Loop. It is the result of a supernova explosion visible from Earth about 10,000 years ago. It is about 1,400 light years away from Earth. IC 1340 is about 12 light-years across.

It takes Neptune a whole year to make an orbit around the sun...but that's a Neptune year of 165 Earth years!

N11: Star Clouds of the LMC - APOD - NASA

Globular star cluster Messier 9 (M9) has over 300,000 stars within a diameter of about 90 light-years. It is 25,000 light-years from Earth, near the central bulge of our Milky Way galaxy in the constellation of Sagittarius. Imagine the night sky on a planet orbiting one of these stars!

Between the constellations Libra & Serpens is the globular star cluster M5, packing 100,000 stars or more, bound by gravity, into a region about 165 light-years in diameter. It lies some 25,000 light-years away from planet Earth. The stars in M5 are some of the oldest in the Milky Way, some 13 billion years old.

Death Star: Eta Carinae, one of the closest stars to Earth is huge and unstable and will likely explode in a supernova in the relatively 'near future' (On an astronomical timeline this could be a million years from now). via NASA #Eta_Carinae #Supernova #NASA