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Peptide
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Lymphadenopathy
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Vitamin D
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Lophocebus
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Anxiolytic
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Brain death
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Monocotyledon
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Porphyric
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Exciton
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Herpes
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Coaxial cable
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Bursitis
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Silver birch
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Cuneiform
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Counterfeit medicine
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European hornet
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Electrolyte
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Cline
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Ares V
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Biometry
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Measles virus
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Allopatry
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DNS
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Epidemic
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Carbon
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Wire drawing
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Latent
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GDP
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Joule effect
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Trisomy
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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