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Hybrid hard drive
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Hydrogen engine
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Vitamin A
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Channel
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Precession
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Crystal growth
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Conception
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Orbit
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Cancer
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Hypha
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Antispastic agent
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Vasectomy
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Taq polymerase
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Gyrus
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Magnet
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Water Framework Directive
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Metamict
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Heatwave
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TIPP
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Lava dome
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Elementary particle physics
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Cryptocrystalline
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Datagram
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SHA-1
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Heliography
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Rosacea
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Refringence
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Magnetometer
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Aqueous
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AMP
Parsec
A parsec is the distance at which a star must be to have a parallax of 1 second of arc. (In fact there are no stars as close as that). 1 parsec = 3.2616 light-years.
Credit: Rennes Astronomy Society
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