The small galaxy Was 49b is being eaten by the much larger galaxy Was 49a. But 49b will not go gently into that good night: It's blasting out a lot of radiation, because at its heart is a hugely outsized black hole.
Galaxies are huge. Our solar system is huge, but our sun is just one of 200 billion stars nestled in our Milky Way Galaxy. That's a lot of space, but scientists have just found a new galaxy cluster that not only dwarfs the Milky Way, but produces new stars at a staggering rate.