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Onion
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Acetyl-coenzyme A
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Zenith distance of a direction
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Schists
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Clementine
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The Bohr magneton
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E-book
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Nanoparticle
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Papilio phorbanta
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Alkaline
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Autapomorphy
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Migratory
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Leucine
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Prime number
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Retified wood
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Endotoxin
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Active continental margin
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Ammonia
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Quasar
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LHC
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Endeavour
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Continental shelf
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Bigelow Aerospace
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Predisposition
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Optical prism
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Time-lapse
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M48
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CDK
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Growth factor
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Unweighted digital code
M101
M101 is a beautiful spiral galaxy seen face-on in the constellation of Ursa Major. Its apparent size is nearly a full Moon, but its extent and fine spiral arms can only be observed through a large telescope.
It is 27 million light-years away and is the brightest in a group of at least 9 galaxies.
Photographed by "baf" (the person's pseudonym on the astro forum) using a digital reflex camera fitted behind a 150 mm diameter telescope.
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