DICTIONARY LOOKUP
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The Windiest Planet
Dark, cold and whipped by supersonic winds, Neptune is the last of the hydrogen and helium gas giants in our solar system. More than 30 times as far from the sun as Earth, the planet takes almost 165 Earth years to orbit our sun. In 2011 Neptune completed its first orbit since its discovery in 1846.

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 Kelvin (K) 0 Kelvin is absolute zero; Water Ice melts at 273 K (= 00C = 320F); Water boils at 373 K (= 1000C = 2120F).
 Kepler, Johannes (1571-1630) German astronomer and mathematician. Considered a founder of modern astronomy, he formulated the famous three laws of planetary motion.
 kilogram (kg) = 1000 grams = 2.2 pounds, the mass of a liter of water.
 kilometer (km) = 1000 meters = 0.62 miles.
 kinetic energy The energy of motion; equivalent to one-half an objects mass multiplied by its velocity squared.

Can't find it? Don't understand it? Ask us.
 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
 Find entries starting with containing
 Kelvin (K) 0 Kelvin is absolute zero; Water Ice melts at 273 K (= 00C = 320F); Water boils at 373 K (= 1000C = 2120F).
 Kepler, Johannes (1571-1630) German astronomer and mathematician. Considered a founder of modern astronomy, he formulated the famous three laws of planetary motion.
 kilogram (kg) = 1000 grams = 2.2 pounds, the mass of a liter of water.
 kilometer (km) = 1000 meters = 0.62 miles.
 kinetic energy The energy of motion; equivalent to one-half an objects mass multiplied by its velocity squared.