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Principle of action and reaction
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Exothermic
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Piscivore
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Carcinogen
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Hairless
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Dysmetria
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Conformator
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Magic number
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CPU
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Succinate
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Plasticity
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Hipparcos
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Colour
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Tempo
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Gas planet
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Germ
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Lyase
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Tutorial
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Tropical period
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CCITT No. 7
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Semelparity
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Phase contrast microscope
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Isostasy
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Stalagmite
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Sweet Chestnut
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Asymptomatic
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Adrenal glands
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Passion fruit
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Rootlet
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Ethylene
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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