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Mouse
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Greenstick fracture
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Increment
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Apollo 11
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Dawn
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Leukoaraiosis
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Pre-neoplastic lesion
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Vertical wind shear
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Influenza virus
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tRNA
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PRAM
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Metop
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Modulation
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Biofuel
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Diurnal parallax
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Retreading
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Exotoxin
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Circuit switched connection
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Falconiformes
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Neoteny
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Vitamin B1
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Carbene
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Nematode
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Self-signed key
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Rodent
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Merlot
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Xenopus laevis
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Homo heidelbergensis
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Chlordecone
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Blennorragia
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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