3 objects
Black holes & exotica
Quasars, magnetars, wormholes and things that bend light.
TON 618 A black hole of some forty billion Suns, whose event horizon would dwarf the orbit of Neptune → Sagittarius A* The black hole at the heart of the Milky Way, weighed by the stars that whirl around it → Gaia BH1 A silent black hole about 1,560 light-years away, given away only by the Sun-like star circling it →