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Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

See Explanation. Clicking on the picture will download the highest resolution version available.

Moon Shadow Moves Over Africa

Explanation: When the Moon's shadow reached out and touched the Earth last week, the result was a solar eclipse . Such an eclipse is total only for observers located along a narrow path corresponding to the ground track of the shadow's dark central portion or umbra . For this eclipse, racing along at nearly 2000 kilometers per hour, the Moon's umbra obligingly crossed over land along regions of Africa and Australia . Totality lasted for about two minutes or less at a given location. Many nearby regions fell within the lighter but much wider outer shadow region, the penumbra , and witnessed a partial solar eclipse . The above movie follows the Moon's shadow as it crossed Africa during a similar eclipse in June 2001. Each frame is separated in time by about 20 minutes. The movie was created from frames taken by the orbiting European satellite MeteoSat-6 .

Date December 9, 2002
Credit Credit and Copyright: EUMETSAT
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.