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Glial cells
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Toxic waste
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Immunodeficiency
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Thylakoid
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Non-spectral colour
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Basal cell carcinoma
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Macroalgae
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Alkaline
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Videotex
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Glucose
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Disruptive colouration
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Keplerian orbit
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ECC
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Duchenne myopathy
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Catchall
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Alar bar
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Analogy
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Hapten
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Lepton
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Secondary
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Ebola Virus
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Transplant organ or tissue
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Hypothesis
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Hartley 2 comet
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Semen
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Aneuploidy
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OSPAR Convention
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Digital signature
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Hooke's law
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Aulacogen
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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