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Taikonaut
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Meteosat
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Yohkoh
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Basophil
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Ultrabasic
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CD-V
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Locus
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Biofilter
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Vestigial structure
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Nictitating membrane
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EEG
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Neurochip
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Standard
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Serine
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Perihelion
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Metapopulation
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Velcro
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Genetic polymorphism
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InnoDB
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Google AdSense
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Septicaemia
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Hartley 2 comet
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Schists
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Excited state
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Radiative forcing
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Salt gland
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Neanderthal
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Calvin cycle
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Arterial hypertension
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Power consumption
M2
M2, which is the second object in the Messier catalogue, is a globular cluster in the constellation of Aquarius. Discovered by Maraldi in 1786, it has about 150,000 stars and is very dense.
It can be seen with the naked eye in a clear sky; its apparent diameter is equivalent to half a full Moon.
Picture taken using a CCD camera and a 150 mm diameter telescope, by "Chamois" (the person's pseudonym on the forum)
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