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Radiotherapy
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Boot
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Coelacanth
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Blu-Ray
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Lunar month
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Planum
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Microgranular rock
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Passion fruit
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Translucent
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Fly
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Lithium-ion battery
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Piciformes
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Optical doublet
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Fayalite
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DVD audio
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Dysplasia
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Visual evoked potentials
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Piscivore
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Aromatic
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Influenza virus
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Diaphragm
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Keplerian elliptic motion
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Mesohaline water
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Callus
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Handkerchief tree
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AFSSA
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PREBAT
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Triple therapy
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Columbiformes
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XMM-Newton satellite
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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