Black Holes

Exotic Objects, Galaxies

Ask Astro: Can a black hole form without a parent star?

Exotic Objects, Stars

What are stellar-mass black holes?

Exotic Objects, Planets

Ask Astro: Does Planet Nine have enough mass to be a black hole?

Exotic Objects

Snapshot: Dusty light veers from a black hole’s throat

Exotic Objects, Galaxies

Ask Astro: Do supermassive black holes create bars in galaxies?

Cosmology, Exotic Objects

Tests of general relativity with gravitational waves can go awry

Exotic Objects, Galaxies

Astronomers score a triple-double

Exotic Objects

Have astrophysicists finally discovered primordial black holes?

Exoplanets

How TESS hunts more than just exoplanets

Exotic Objects

Watch: Dancing supermassive black holes

Exotic Objects, Galaxies, Robotic Spaceflight

Snapshot: Rare double quasar caught in action

Cosmology, Exotic Objects

Ask Astro: How do gravitational waves reveal the distances and masses of colliding objects?