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Eclipses


Diamond Ring
This year features two "central" eclipses of the Sun: an annular in May (visible from western U.S. states) and a total in November that you'll have to travel to Australia or the South Pacific to see.

Events during December's eclipse
A Dawn Eclipse of the Moon — November 23, 2011
The Moon will become totally eclipsed for much of North America before sunrise on December 10th.

Diamond Ring
It will be a busy year for eclipse-watchers in the Eastern Hemisphere, but North Americans will have to wait until mid-December to see the Moon covered by Earth's shadow.

Totality on October 27, 2004
Lunar eclipses are leisurely affairs — a pleasure to watch and photograph.

Crater timings
Useful Projects for a Lunar Eclipse — February 19, 2008
Here's all you need to know to help us measure the size of Earth's shadow on Dec. 10, 2011.

Penumbral shading
With a little help, you can see the first hint of the Earth's shadow — the penumbra — on the Moon's surface. Here's what you need to know.

Eclipsed Moon sets over Tucson, Arizona
In Search of Selenelion — June 26, 2010
Saturday's partial lunar eclipse offered some skygazers the rare chance to see the partly-hidden Moon and the rising Sun at the same time.

Looking at the Sun is harmful to your eyes at any time, partial eclipse or no. Fortunately, there are many easy ways to watch the show safely.

Partial Solar Eclipse
Using a safe solar filter, it's easy to photograph a partial solar eclipse.

Totality
A total eclipse of the Sun is a spectacular sight. With a little preparation and advance planning, you can capture your own souvenir portrait of this awe-inspiring sight.



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