Explanation: Few star clusters are seen to be so close to each other. Some 7,000 light-years away, though, this pair of open or galactic star clusters is an easy binocular target, a lovely starfield in the northern constellation Perseus. Also visible to the unaided eye from dark sky areas, it was cataloged in 130 BC by Greek astronomer Hipparchus. Now known as h and chi Persei, or NGC 869 (above right) and NGC 884, the clusters themselves are separated by only a few hundred light-years and contain stars much younger and hotter than the Sun. In addition to being physically close together, the clusters' ages based on their individual stars are similar - evidence that both clusters were likely a product of the same star-forming region.

APOD Editors to Speak: RJN in Philadelphia on Jan. 3 & JTB in New York City on Jan. 4

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

Публикации с ключевыми словами: open cluster - Рассеянное скопление Публикации со словами: open cluster - Рассеянное скопление
См. также: NGC 602: звезды против столбов NGC 7789: Роза Каролины NGC 602: звездное скопление Устрица Скопление 37 Двойное скопление в Персее Плеяды: звездное скопление Семь сестер Двойное звездное скопление в Персее Все публикации на ту же тему >>