DICTIONARY LOOKUP
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Jewel of Our Solar System
Adorned with thousands of beautiful ringlets, Saturn is unique among the planets. All four gas giant planets have rings -- made of chunks of ice and rock -- but none are as spectacular or as complicated as Saturn's. Like the other gas giants, Saturn is mostly a massive ball of hydrogen and helium.

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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.