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When Black Holes Collide
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Millions of Stars in Omega Centauri
Globular star cluster Omega Centauri, also known as NGC 5139, is some 15,000 light-years away.
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Arp 87: Merging Galaxies from Hubble
This dance is to the death. Along the way, as these two large galaxies duel, a cosmic bridge of stars, gas, and dust currently stretches over 75,000 light-years and joins them.
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M82: Galaxy with a Supergalactic Wind
Why is the Cigar Galaxy billowing red smoke?
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Astronomy Picture of the Day: Spiraling Supermassive Black Holes
Do black holes glow when they collide? When merging, co-orbiting black holes are sure to emit a burst of unusual gravitational radiation, but will they emit light, well before that, if they are surrounded by gas?
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