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Definition
Eclipse: Total or partial masking of a celestial body by another along the line of sight. Solar eclipses result from the Moon blocking the Sun relative to the Earth; thus Earth, Moon and Sun all lie on a line. More »
Occultation: An eclipse of a celestial object by the Moon or another solar system body.
Transit: 1) The act of one celestial body passing in front of another. For example, when astronomers observe Mercury to be moving in front of the Sun, they say that Mercury is transiting the Sun. More »

Stargazing Tip
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Displaying 1 to 5 (of 48 total) results | More results »
Title	Air Date
More Epsilon Aurigae	August 4, 2009
Moon and Antares	June 6, 2009
Annular Eclipse	January 25, 2009
Eclipse Rockets	October 12, 2008
Dangerous Eclipse	September 7, 2008
Note: Audio versions of our programs will be available the day after they air. Visit the transcript page to listen.

Displaying 1 to 5 (of 7 total) results | More results »
Image
Lunar Eclipse	Crossing the Sun	Ring of Fire	Shadowy Moon	Seeing Red

Displaying 1 to 3 (of 3 total) results

Question

How do astronomers find planets outside our solar system?

When are this year's solar and lunar eclipses?

What is the difference between a lunar and a solar eclipse?