September 2021

The world's best-selling astronomy magazine offers you the most exciting, visually stunning, and timely coverage of the heavens above. Each monthly issue includes expert science reporting, vivid color photography, complete sky coverage, spot-on observing tips, informative telescope reviews, and much more! All this in an easy-to-understand, user-friendly style that's perfect for astronomers at any level.

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Features

Dark matter: The unusual suspects

by
Robert Lea

Astrophysicists have compiled the culprits for dark matter — but still lack the evidence to convict any of them.

Untangling the Tarantula Nebula

by
Richard Talcott

This vast cosmic cloud gives us a spectacular close-up view of stars bursting into life.

Discover the strangest galaxies in the sky

by
Alan Goldstein

Crashing, colliding, and tangoing, these peculiar galaxies reveal the grand evolution of the cosmos.

Deep astroimaging in Hydrogen-alpha

by
Michael E. Bakich

Designed for astrophotographers, the Canon Ra specializes in capturing the reddish cosmic glow that’s invisible to many other devices.

The next 20 years of solar eclipses

by
Michael E. Bakich

This list will help you plan the spots where you’ll stand beneath the Moon’s shadow.

Celebrating a century of variable star astronomy

by
Stella Kafka

Since its founding in 1911, the American Association of Variable Star Observers has been an indispensable organization for amateur astronomers, engaging stargazers in exploring the night sky.