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Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets, Telescopes
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Spitzer maps temperatures on a super-Earth

The planet has extreme temperature swings and perhaps active lava flows.

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See Jupiter at its best

The solar system's largest planet reaches peak brightness on March 8.

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Astronomy Insights

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Eclipse tour

A must-see sky event!

Join TravelQuest International with Astronomy and Discover magazines on one of three great tour options surrounding this celestial spectacle

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New Planet 9?

If this giant world exists, it would be 10 times the mass of the Earth.

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Sign Up for Astronomy's five-part Observing Essentials email series!

A sickness over the land

Why scientists believe what they do, and why the public doesn't always follow. Learn more »

New brightest supernova

The record-breaker tests what scientists know about exploding stars.

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Spitzer maps temperatures on a super-Earth

The planet has extreme temperature swings and perhaps active lava flows.

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