Wildfire Relief Fund for Lick Observatory
Make a Donation

The Milky Way’s supermassive black hole

The Milky Way’s black hole is undoubtedly the strangest thing in our galaxy—a three-dimensional cavity in space ten times the physical size of our sun and four million times the mass, a virtual bottomless pit from which nothing escapes. Every major galaxy, it’s now believed, has a black hole at its core.