Magazine | Page 159 of 278 | Astronomy.com

When matter and antimatter annihilate each other

Deep-Sky Objects

Cosmic phantoms

The Pleiades (M45)

10 top winter binocular treats

Editor David J. Eicher’s top 20 Queen songs: 10-1

How do astronomers determine what causes starlight to shift toward the red end of the electromagnetic spectrum?

Sharing the Adirondack sky

The miracle of Lab Color

The super secret sky

Cash and infinity

Deep-freeze astronomy

I understand that new stars form out of mostly hydrogen with smaller amounts of heavier elements. If helium, carbon, oxygen, and other heavier elements were abundant enough to form stars, could they?

Why are most impact craters nearly perfectly round? I’d expect the impacts to result from an obtuse or glancing blow that would leave an oblong or ellliptical shape.