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50 years later: Apollo 8

Jim Lovell relives the first Moon trip.

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Holiday Gift Guide

Watch our exclusive video for great gift ideas this Holiday season.

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Voyager 2 Reaches Interstellar Space

The probe's measurements show it's left the influence of our Sun's solar wind.

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Take a trip you'll never forget!

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Astronomy for kids

Find out what it's like on other planets, learn how far away the stars are, or try a fun, space-themed project from our Astronomy for Kids page!
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Join us!

On December 5, 2020, join us as we set sail for 15 days aboard our privately chartered cruise ship. Learn more >>

Superflares

Life near small, violent stars.

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New For 2019!

Your essential reference to the night sky.

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Meet the frozen super-Earth around Barnard's star

Just six light-years from Earth, the second-closest star system to our Sun hosts a planet at least three times the mass of our own.

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Discovering the dimmest galaxies

Astronomers see beyond the Milky Way’s glare into a hidden realm. Read more >>

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Phaethon

New look at a weird, blue rock.

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Sift through the debris of our solar system's formation

Explore our solar system's building blocks and find out everything you need to know about comets and asteroids in this free guide from Astronomy and Celestron. Get it here >>>
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50 years ago: Apollo 7

The first manned Apollo mission remains the most ambitious and successful test flight of any new flying machine ever. Read more >>>

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Subscribe today and get Welcome to Astronomy booklet free!

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The Sky This Week

What's up in the night sky?

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Could humans live on a super-Earth?

What's the max gravity our bodies can survive?

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Join us!

Beneath Arizona's vast, clear skies you find some of most exciting astronomical destinations in the world. Learn more >>

Voyager 2 Reaches Interstellar Space

The probe's measurements show it's left the influence of our Sun's solar wind.

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