The Orion Nebula may be the best-known emission nebula, but it loses to the Carina Nebula (NGC 3372) as the most spectacular. Measuring 2° across, the Carina Nebula looks like an ethereal orchid blossoming, with many dark rifts dividing it into several distinct “petals.”

Residing about 7,500 to 8,500 light-years from Earth, the Carina Nebula lies within its namesake constellation, Carina the Keel. Its southern location (declination –60°) keeps it below the southern ho

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