Year of the Comet
Comet C/2011 L4 (PANSTARRS)

PANSTARRS information

Comet C/2012 S1 (ISON)

ISON information

News & Observing

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Accretion disk of a stellar mass black hole
A new study by astronomers at NASA, Johns Hopkins University, and the Rochester Institute of Technol... Read more »Read more »This animation of supercomputer data takes you to the inner zone of the accretion disk of a stellar-... Read more »
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Map stars and more for your location
Zoom through stars on 24 maps
MERCURY_CRESCENT_006Friday, June 14 The two inner planets remain companions in the early evening sky all week. Look low ... Read more »
     
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    Intro to the Sky

    Learn the constellations, explore the Moon, tour the solar system, and much more!

    Astronomy for Kids

    Find out what it's like on other planets. Learn how far away the stars are. Try a fun, space-themed project.

    Urban Skies
    Astronomy columnist Phil Harrington shares tips on how to observe from the city.
    Astronomy Myths

    Check out some of the common myths that revolve around astronomy

    Glossary

    Check out our guide to astronomical lingo

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