Phil Plait

How do you find the distance to objects quadrillions of km away?

If confirmed, it's the first isolated stellar-mass black hole ever found.

2020 XL5 shares an Earth-like orbit.

From the Moon to the farthest quasar, the big radio astronomy stories of 2021.

Eta Car is a monster, surrounded by the debris of violent eruptions.

Immense solar storm occurred over 9,000 years ago that would be devastating today.

Huge black hole is actually helping stars be born.

Two papers come out nearly simultaneously arguing both sides.

Being near a dying star is bad for a planet.

Astronomers calculate the evolution of black holes over the Universe's existence.