Eta Carinae Nebula (NGC 3372)
In addition to Eta Carinae itself, the Nebula contains several stars that are among the hottest and most massive known, each about 10 times as hot, and 100 times as massive, as our Sun.
Eight catalogued open clusters fall within the area of the Eta Carinae Nebula. These are Collinder (Cr) 228, Bochum (Bo) 10, Trumpler (Tr) 14 (also cataloged as Cr 230), Tr 15 (= Cr 231), Cr 232, Tr 16 (= Cr 233), Cr 234, and Bo 11. The star Eta Carinae is part of the cluster Trumpler 16.
The Keyhole Nebula (NGC 3324) is a dark cloud, whose round portion is some 7 light-years across, that is silhouetted against the brighter background near Eta Carinae.
Related category• NEBULAE AND STAR CLUSTERS
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