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EEG
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Meningitis
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Spicules
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Message digest
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Mithridatism
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E-book
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Exoplanet
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Internal tide
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Group of galaxies
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Claudication
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Sea ice - First year average
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Auditory evoked potential
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IAM
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Symbiosis
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Rate determining step
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Gas laser
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Neutral current
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European brown bear
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Restriction enzymes
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Appulse
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Nematocyte
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Cupule
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Ganymede
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Terrestrial planet
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Geoid
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DDT
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Geoengineering
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Rhizoid
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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