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Antispastic agent
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Feather
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Tachycardia
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ATV
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Berne Convention
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Oncotic pressure
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Tungsten
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Pancreatic islet
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SST
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Epoxide
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Laser
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Abnormality
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Wingless
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Hackberry
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Kyoto Protocol
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Septicaemia
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Eucrite
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Phagocytosis
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Columbiformes
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ANSI
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Cycloplaegia
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Astrometric coordinates
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Ozonator
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Semi-permeable membrane
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CRBPO / Centre for Research in Biology and Bird Population
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Isoleucine
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Anthrax
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TVOD
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Huffman
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Cloaca
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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