Tied with the Big Dipper for the biggest celebrity constellation, Orion is the great hunter in our night sky. If you look carefully on a clear night, you can see the great Orion Nebula right beneath Orion’s belt. The nebula contains on estimated 2,000 times the mass of our Sun and is one of the best—observed stellar nurseries — a hotbed of new stars. Observing the Orion Nebula has helped astronomers understand more about how stars and planets form.
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