The universe

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Image - Interacting Galaxies Group Arp 194
Interacting Galaxies Group Arp 194 - 600 light years away
Image - Stephan's Quintet
Galaxy group Stephan's Quintet is located in the constellation Pegasus.
The Tycho supernova remnant in the Milky Way, produced by the explosion of a white dwarf star in our galaxy. Low-energy X-rays (red) show expanding debris from the supernova explosion and high energy X-rays (blue) show the blast wave, a shell of extremely energetic electrons. These high-energy X-rays show a pattern of X-ray "stripes" never seen in a supernova remnant.
Spiral galaxy Messier 90, in the constellation Virgo, displays obvious interaction with the nearby smaller gallery.
Haunting Photos: The Spookiest Nebulas in Space
Credit: HST/NASA/ESA - The glowing eye of NGC 6751 in the constellation Aquila, the nebula is a cloud of gas ejected several thousand years ago from the hot star visible in its center.
Astronomy Picture of the Day
NASA's pic of the day! Stephan's Quintet. 1st identified compact galaxy group.
Hubble
The huge globular cluster Omega Centauri showing new hot stars in blue, white dwarf stars and older, red stars.
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