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Dwarfism
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Oxidation
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Radon
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Fluorescein
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Bacteriophage
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Avalanche
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Wheel motor
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Supination
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Meudon observatory
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Onion
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Thermal bridge
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African longfin eel
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Oxidation zone
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Object-oriented language
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Metacarpus
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Clausius-Clapeyron relation
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Antineoplastic
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Apollo 1
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Picosecond
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Stockholm Convention
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Osmolarity
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Carboniferous
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Alter Eco
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Ozone layer
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Pleiades
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Bure laboratory
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Luminance
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Heterochrony
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Passive continental margin
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Apoplexy
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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