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

PANSTARRS information

Comet C/2012 S1 (ISON)

ISON information

News & Observing

The latest new and observing tips

Q1MOONFriday, May 17 The First Quarter Moon hangs high in the southwest as darkness falls, and then sinks ... Read more »
     
    Jupiter-and-VenusA pretty vista awaits viewers in early June when Mercury, Venus, and Jupiter line up in evening twil... Read more »
    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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