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Cancer
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Cross-certification
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Farad
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Right ascension
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Juvenile water
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Dietary supplement
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Eczema
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Citrate cycle
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Be star
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WAN
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Polyp
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Contagious
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Articular cartilage
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BIOS
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Intrusion prevention system
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Disthene
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Barred galaxy
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Neoformation
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Grey poplar
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Pregnancy test
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Anatexy
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Sex glands
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GTP
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Chromophore
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Lyman-alpha forest
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European black pine
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Nematocyte
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Mean equatorial of the date
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Log in
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Key length
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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