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Core 2 Duo
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Lesser kestrel
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Artesian well
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Seam
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Meridian of a celestial body
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Diffie-Hellman
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Kernel
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Silkworm
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Droplet plume
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Laser
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CME
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Heat transfer fluid
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Time origin
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Fog
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Rhyolite
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Orbital
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Circuit switched connection
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Cyclotron
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Fayalite
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Nucleic acid
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Livery
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Hapten
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Limestone
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Duplex
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Limescale
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Apron
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Stereoisomerism
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Curative
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Neovascularisation
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Aerodynamic vehicle
The Dumbbell nebula
This was the first nebula discovered by MESSIER in 1764.
It also looks like an apple core; what can be seen is the gaseous envelope ejected by a dying star in the centre of the nebula.
M27 is a remarkable object through a pair of binoculars because of its apparent size (half a full Moon) and its brightness (magnitude 7.4).
This is a 35 minute exposure photograph using a CCD camera behind a 15 cm telescope. picture by Chamois.
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