Event horizon is spherical outer boundary of black hole. Gravitational influence prevents light from escaping at event horizon. Objects approaching horizon appear reddening and fading. Event horizon contains singularity where all mass collapsed
Located 12 million light-years away in Ursa Major constellation. Has D25 diameter of 29.44 kiloparsecs (96,000 light-years). Contains 70 million M☉ supermassive black hole in active nucleus. Best observed during April with telescopes 8 inches or larger
Dwarf galaxy located 163,000 light-years away from Milky Way. About 9.86 kiloparsecs across and 100th mass of Milky Way. Contains prominent central bar and spiral arm. Predicted to merge with Milky Way in 2.4 billion years
Supernova is a catastrophic explosion of a massive star at its end of life. Supernovae emit more energy than our sun in seconds. Milky Way galaxy should have supernova every 50 years. Most visible supernova remnants are expanding space clouds
Milky Way's center is 26,000 light-years away, located near Sagittarius and Scorpius. Supermassive black hole SGR-A* is 4.3 million solar masses in size. Early astronomers speculated about Sirius at center, but Karl Jansky detected radio emissions in 1933
Gargantua is a supermassive black hole aura with 1 in 430M+ chance. Player appears as blue star floating above black hole. Features spiral galaxy below and black void above. Contains accretion disk with black hole and star matter