M87 in Virgo
Copyright: Adam Block/NOAO/AURA/NSF
M87 is a fascinating object in the constellation of Virgo. Discovered by Charles Messier in 1781, it is a giant elliptical galaxy around 70 million ly away. Like our own galaxy, it has a halo of globular clusters around it, although in M87's case they number in the thousands. M87 is a powerful radio source as well as a producer of strong x-rays. The most likely reason for this is a massive black hole at the centre of the galaxy.
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