wjjhoge posted: "The Keyhole is a small dark cloud of cold molecules and dust within the Carina Nebula, containing bright filaments of hot, fluorescing gas that is silhouetted against the much brighter background nebula. The diameter of the Keyhole structure is roughly 7 "
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The Keyhole is a small dark cloud of cold molecules and dust within the Carina Nebula, containing bright filaments of hot, fluorescing gas that is silhouetted against the much brighter background nebula. The diameter of the Keyhole structure is roughly 7 light years. Its appearance has changed significantly since it was first observed, possibly due to changes in the radiation from Eta Carinae.
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