Magazine

Science

How do planets, moons, and asteroids become round?

Science

How can astronomers know details about the appearances ancient comets?

Science

If photons have no mass, how can gravity bend light?

Observing, Science

What’s the best way to observe a meteor shower?

Observing Basics, Stars

Would astronauts on the Moon observe Earth occulting background stars?

Observing

Stephen James O’Meara’s secret sky: Vanishing acts, part 2

Observing

Glenn Chaple’s observing basics: The king’s astronomer

Science

Bob Berman’s strange universe: Staring contest

Science

What is a planemo?

Science

Bob Berman’s strange universe: Marinating the news

Science

How are comets named?

Science

Does a black hole stay a black hole for life?