英仙座雙星團
The Double Cluster in Perseus

來源:Ron Brecher|發表日期:2025-08-07
這個令人驚歎的星域橫跨英勇的北方英仙座約三個滿月( 1 . 5 度)。這裡有一對著名的疏散星團--英仙座 h 星團和英仙座 Chi 星團。這兩個星團也被編入 NGC 869 (右圖)和 NGC 884 ,距離太陽約 7000 光年,包含的恆星比太陽年輕得多,溫度也高得多。 這兩個星團相距僅幾百光年,根據單個恆星的年齡,它們都年輕了 1300 萬年,這證明這兩個星團很可能是同一個恆星形成區的產物。在雙筒望遠鏡或小型望遠鏡中,雙星團總是令人賞心悅目,甚至在黑暗的地方也能被肉眼看到。
原文:This stunning starfield spans about three full moons (1.5 degrees) across the heroic northern constellation of Perseus. It holds the famous pair of open star clusters, h and Chi Persei. Also cataloged as NGC 869 (right) and NGC 884, both clusters are about 7,000 light-years away and contain stars much younger and hotter than the Sun. Separated by only a few hundred light-years, the clusters are both 13 million years young based on the ages of their individual stars, evidence that both clusters were likely a product of the same star-forming region. Always a rewarding sight in binoculars or small telescopes, the Double Cluster is even visible to the unaided eye from dark locations.
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