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Thermosiphon
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Haemodynamics
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C cells
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Endeavour
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Landscape charter
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Bit-map
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Neurosurgery
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Archaea
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Genetic disease
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Precession
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Metacarpus
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Pipeline
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Substitution based encryption
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Chlamydia infection
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Certificate
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Fallopian tubes
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Western Palearctic ecozone
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Ecotone
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Diurnal parallax
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Inhalation
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Zygodactyly
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Constellation of Auriga
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Monkey puzzle tree
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Aetiological
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Chronic pollution
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Hardness of water
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Shell
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Dextrose
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Thrombocyte
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True anomaly
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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