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Cerebrospinal
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Ferromagnetism
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Multiplexing
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Photosynthesis
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Elgamal signature scheme
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Ecological footprint
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Lamellar
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Optical doublet
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Stimulated emission
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Eligibility
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IEEE
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Constellation of Pegasus
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Diplopia
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Scraping
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Propellant
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Charnockite
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Paramagnetic
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M 37
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Velociraptor
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M86
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Web-footed bird
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The theory of punctuated equilibrium
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Inflorescence
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Restricted species
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Descriptor
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Pit
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CEV
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Parsec
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Starch
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Circuit routing
M15
M15 is a fine globular cluster in the constellation of Pegasus 34,000 light-years away. In a dark sky, it can be seen with the naked eye as a small blurred spot. M15 has an extremely dense nucleus; this density might be caused by a very massive object (a black hole?) which might hold many stars in a relatively small volume.
With a 10 min. exposure using a CCD camera and a 150 mm telescope, "Chamois" (the person's pseudonym on the forum) captured this cluster.
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