The galaxy cluster Abell 21
Red-band image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
Finder chart
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From Cambridge , Abell 21 will become visible at around 18:31 (EST) as the dusk sky fades, 33° above your western horizon. It will then sink towards the horizon, setting 4 hours and 35 minutes after the Sun at 21:58.
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Name
Abell 21
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Object Type
Galaxy Cluster
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