Magazine

Science

Could you recommend an astronomy book for beginners?

Science, Stars

How many supernovae explode each second in the universe?

Science

More meteorite images

Observing

Phil Harrington’s binocular universe: Cepheus’ fall delights

Science

Can telescopes see a star’s disk?

Observing

Glenn Chaple’s observing basics: See the red star round-up

Science

What is the difference between comets and asteroids?

Science

Bob Berman’s strange universe: The magic canvas

Science

How do astrophysicists measure a black hole’s mass?

Observing, Science

Phil Harrington’s binocular universe: The Cygnus Arm flexes its muscle

Science

With lots of elements like uranium, how can the star HE 1523-0901 be 13.2 billion years old?

Science

What is a Bok globule?