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A Double Star Cluster
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A Double Star Cluster
Credit & Copyright: F. Antonucci, M. Angelini, & F. Tagliani, ADARA Astrobrallo
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.

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<<  Yanvar'  >>
Pn Vt Sr Cht Pt Sb Vs
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14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31      
1995   1996   1997
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2007   2008   2009
2010   2011   2012
2013   2014   2015
2016   2017   2018
2019   2020   2021
2022   2023   2024
Yanvar'
Fevral'
Mart
Aprel'
Mai
Iyun'
Iyul'
Avgust
Sentyabr'
Oktyabr'
Noyabr'
Dekabr'
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.

Russkii tekst
Based on Astronomy Picture Of the Day
Publikacii s klyuchevymi slovami: open cluster - Rasseyannoe skoplenie
Publikacii so slovami: open cluster - Rasseyannoe skoplenie
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