Magazine

Science

Do you know about Asterion?

Science

Why does the zodiacal dust cloud still exist after billions of years? Does something replenish it?

Science

Have astronomers seen any spectral lines they can’t identify?

Astrophotography

Targeting galaxies

Stars

As I understand, a star will “blow away” any remaining gas and dust in the immediate area once it begins fusion. So why can some stars collect billions of times more mass before blowing away the remainder of their embryonic material?

Exoplanets, Planets, Solar System

Saturn struts its ringed glory

Astrophotography

Galaxy rising, part two

Cosmology

The universe’s extra dimensions

Science

A cosmic-ray impact

Exoplanets, Planets, Robotic Spaceflight

How many transiting exoplanets might NASA’s Kepler spacecraft find?

Science

Who are we?

Solar System

Comet color and you