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It’s been known for a long time that galaxies are not picky eaters. In fact, they’re cannibals.
Yes, they eat each other. If a little galaxy gets too close to a big one, the gravity of the beefier of the pair will rip the littler one apart, and the contents of the loser get absorbed into the winner. Most big galaxies show evidence of this, and our own Milky Way is eating at least one galaxy right now, and has probably swallowed down dozens before it.
But we’re pikers compared to NGC 1132, a monster elliptical galaxy over 300 million light years away. In visible light it’s 20% bigger in diameter than the Milky Way, and may outmass our galaxy by a factor of ten! It’s truly gargantuan. This Hubble image reveals the enormous extent of the galaxy, but even that’s only a part of the picture; most of the mass of this galaxy is in hot X-ray emitting gas and invisible dark matter.
Still, there is beauty in this overwhelming visible-light picture. Besides the obvious and pleasing smooth profile of the galaxy itself, there are also thousands of galaxies in the background, making the high-res original image well worth your time to download and peruse.
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