Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.astronet.ru/db/xware/msg/1162673
Дата изменения: Fri Nov 10 17:03:49 2006
Дата индексирования: Tue Dec 25 13:26:19 2007
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Поисковые слова: annular solar eclipse
Rings Around Beta Pictoris
Astronomy Picture of the Day
    


Rings Around Beta Pictoris
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Rings Around Beta Pictoris
Credit: Paul Kalas (STScI) et al., WFPC2, HST, NASA
Explanation: An unusual dust disk surrounds nearby star Beta Pictoris. Discovered in 1983, astronomers are still learning just how unusual this disk is. Recent images and computer simulations indicate that the disk contains several elliptical dust rings larger than our own Solar System. The above image taken with the Hubble Space Telescope uncovered evidence of these rings as apparent knots in the edge-on disk. The ring model naturally explains why the disk protrudes longer on one side than the other. These rings might have been formed when a nearby star passed Beta Pic about 100,000 years ago. Astronomers are searching for this intruder star, which is not the foreground star visible in the wider image. Beta Pic is only 50 light-years away and thought to harbor planets.

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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: planetary system
Publications with words: planetary system
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