NEW: NASA’s New Horizons spacecraft measured the feeble glow that comes from myriad galaxies filling the universe. The finding has settled a long-standing mystery about the source of background light:

NASA Science

Hubble Space Telescope - NASA Science

Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.

When an astronomer spies stars or gas moving with speeds or temperatures suggesting they are orbiting something massive and small, it’s a clue that a black hole is nearby. Check out what scientists watch out for in their search for black holes: https://webbtelescope.pub/3MZtygj