Sagittarius A*

David Kipping: Alien Civilizations and Habitable Worlds | Lex Fridman Podcast #355

Lex Fridman

The supermassive black hole at the center of our galaxy, mentioned as a potential location for advanced alien civilizations to harness energy or for intergalactic travel via black hole propulsion.

The Technical Challenges of Measuring Gravitational Waves - Rana Adhikari of LIGO

Y Combinator

The supermassive black hole at the center of the Milky Way galaxy, used as a reference point for hypothetical closer black hole mergers.

Sean Carroll: General Relativity, Quantum Mechanics, Black Holes & Aliens | Lex Fridman Podcast #428

Lex Fridman

Revealing the Nature of Dark Matter

Fermilab

The supermassive black hole at the center of the Milky Way galaxy.