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Sonography
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GNU
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Geostationary orbit
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Aetiological
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Firewire
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Shearing-flock
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Celestial meridian
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DMT
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Vitamin D
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Pelagic
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Asymmetric cryptography
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Trisomy 21
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Tarragon
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Bulimia
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European sea sturgeon
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Breast-feeding
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Endotoxin
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Southwest European nase
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Karman line
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Lamination
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Anosognosia
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Java
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bps bits per second
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Mutation
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Argan oil
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Ion
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Parenteral
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Macroalgae
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Screening
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Newbie
Sedna
Sedna is a planetoid, "the largest trans-Neptunian after Pluto" according to its discoverers.
Sedna was found by astronomers from the California Institute of Technology in 2004.
It is three times further from the Sun than Pluto, at the current limit of the solar system.
It is between 1180 and 2360 kilometres in diameter.
The size of Sedna compared with other stars
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