Iguaçu Starry Night
http://apod.nasa.gov/apod/ap100514.html
This is a picture of the night sky taken on May 4 near the Iguaçu Falls and National Park in Argentina. Many prominent objects are visible in this picture. The brightest star in the sky, Sirius, is to the right of the photo. It has an apparent magnitude of 1.46 and is 8.6 light years from Earth. Canopus, the second brightest star, is to the left of Sirius. Its apparent magnitude is -.72, and it is located about 310 light years away. The Large and Small Magellanic Clouds are to the left of Canopus. They are irregular dwarf galaxies that orbit the Milky Way. Alpha Centauri and Beta Centauri are above the Magellanic Clouds in the picture. Alpha Centauri is a binary star with a red dwarf companion, Proxima Centauri, which is the closest star to the Sun at 4.2 light years away.
Friday, May 14, 2010
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