SA
Sag A
Place
Sagittarius A* is the supermassive black hole at the center of the Milky Way, with a mass of roughly four million Suns.
2 episodes featuring Sag A
StarTalk with Neil deGrasse Tyson
Exoplanets challenge what makes a world habitable
The episode tests how scientists can distinguish real evidence of life from misleading signals across an unexpectedly diverse planetary population.
Sep 1, 2026 · 54 min
Science Friday
JWST’s little red dots may reveal black hole birth
Identifying these abundant early-universe objects could clarify how supermassive black holes formed, but astronomers still lack consensus on what they are.
Aug 24, 2026 · 13 min