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Completed/Past Missions

Genesis (U.S.)Galileo (U.S.)Nozomi (“Hope”) (Japan)Stardust (U.S.)Deep Impact (U.S.)Official NASA Page for Past MissionsOngoing MissionsMajor Space ExplorationsFuture Missions

Ganymede

Ganymede, 3,275 mi (5,270 km) in diameter, is Jupiter's largest moon, and it is also the largest satellite in the solar system. Ganymede is about one and one-half times the size of our Moon. It is…

Europa

Europa, the brightest of Jupiter's satellites, is about 1,950 mi (3,160 km) in diameter or about the size of Earth's Moon. Its density is about three times that of water. The moon is covered…

Giovanni Battista della Porta

The Question: Do you have information about Giovanni Battista Della Porta? Was he a famous painter, inventor or scientist? The Answer: Two out…

Amalthea

Amalthea, Jupiter's innermost satellite, was discovered in 1892. It is so small—165 mi (265 km) long and 90 mi (150 km) wide—that it is extremely difficult to observe from Earth. Amalthea…

Van Allen, James Alfred

(Encyclopedia) Van Allen, James Alfred, 1914–2006, American physicist and space scientist, Mt. Pleasant, Iowa. A graduate (Ph.D 1939) of and professor of physics (1951–85) at what is now the Univ. of…

thermometer

(Encyclopedia) thermometer, instrument for measuring temperature. Galileo and Sanctorius devised thermometers consisting essentially of a bulb with a tubular projection, the open end of which was…

Math Homework Help

Subjects » Geography » History » Language Arts » Mathematics » Science » Social Studies Homework Skills Writing | Research Speaking & Listening Studying Reference Sources Almanac…

Weather: Is the Pressure Getting to You?

Is the Pressure Getting to You?WeatherMeasuring the AtmosphereThe Take on TemperatureIs the Pressure Getting to You?The Wind in the WillowsIt's Not the Heat, It's the HumidityMeasuring the…