Flashcard sets with a 'orion' term meaning 'm43, also known as de mairan's nebula, is found in this constellation, along with the flame nebula, the horsehead nebula, and this constellation's namesake nebula. the two latter structures are found in barnard's loop, and all of these objects are part of its namesake molecular cloud complex. the trio of stars alnitak, alnilam, and mintaka form its most famous structure, and its alpha and beta stars form parts of the winter triangle and winter circle. found on the celestial equator, ftp name this constellation containing rigel and betelgeuse that is also known as the hunter, with a famous belt.'

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