Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.astronet.ru/db/xware/msg/1162439
Дата изменения: Tue Dec 19 00:00:00 2000
Дата индексирования: Tue Dec 25 17:38:52 2007
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September Sky
Astronomy Picture of the Day
    


September Sky
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September Sky
Credit: Stan Richard
Explanation: Star clusters, planets, and a red giant posed for this portrait of the night sky from rural Jasper County, Iowa, USA. Astrophotographer Stan Richard recorded the four minute time exposure looking east around midnight on September 3rd at Ashton-Wildwood Park. To avoid star trails, his camera was mounted on a barndoor-style tracker to compensate for the Earth's rotation. Can you identify his celestial subjects? (Click on the image for a labeled version.) The Pleiades and Hyades, the closest open or galactic star clusters to the Sun, should be recognizable to beginning stargazers. Of course gas giant Jupiter rules as the brightest object in the picture and the largest planet in the Solar System, but second largest planet Saturn is also visible nearby. For sheer size cool red giant star Aldebaran is more impressive though, spanning about forty times the diameter of the Sun. Sixty light-years away and yellowish in this picture, Aldebaran is known as Alpha Tauri, the brightest star in Taurus, the Bull.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
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NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Based on Astronomy Picture Of the Day

Publications with keywords: Jupiter - Saturn - pleiades - aldebaran - hyades - sky
Publications with words: Jupiter - Saturn - pleiades - aldebaran - hyades - sky
See also:
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