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comets    音标拼音: [k'ɑməts]

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  • NASA Briefing on First Mission to Study Mars Interior
    NASA Invites Media to Discuss First Mission to Study Mars Interior First Interplanetary Launch from West Coast NASA’s next mission to the Red Planet will be the topic of a media briefing at 2 p m PDT (5 p m EDT) Thursday, March 29, at NASA's Jet Propulsion Laboratory in Pasadena, California
  • MEASUREMENTS OF HYAKUTAKE SUGGEST NEW CLASS OF COMETS
    May 31, 1996 Douglas Isbell Headquarters, Washington, DC (Phone: 202 358-1753) Jim Sahli Goddard Space Flight Center, Greenbelt, MD (Phone: 301 286-0697)
  • Kuiper Belt and Oort Cloud - NASA Solar System Exploration
    National Aeronautics and Space AdministrationNational Aeronautics and Space Administration Pluto’s Orbit Typical KBO Orbit Oort Cloud Eris Kuiper
  • In Depth | 1P Halley – NASA Solar System Exploration
    Halley's Connection to Meteor Showers Each time Halley returns to the inner solar system its nucleus sprays ice and rock into space This debris stream results in two weak meteor showers each year: the Eta Aquarids in May and the Orionids in October
  • In Depth | Kuiper Belt – NASA Solar System Exploration
    The small Kuiper Belt Object called Arrokoth is a contact binary It was discovered in 2014 by NASA’s New Horizons science team, using the Hubble Space Telescope
  • In Depth | C 2012 S1 (ISON) – NASA Solar System Exploration
    Comet ISON appears as a white smear heading up and away from the sun ISON was not visible during its closest approach to the sun, so many scientists thought it had disintegrated, but images like this one from the ESA NASA Solar and Heliospheric Observatory suggest that a small nucleus may still be intact
  • In Depth | 2P Encke – NASA Solar System Exploration
    Discovery Comet 2P Encke was first discovered by Pierre F A Mechain on Jan 17, 1786 Other astronomers located this comet in subsequent passages, but these sightings were not defined as the same comet until Johann Franz Encke calculated its orbit
  • In Depth | Perseids – NASA Solar System Exploration
    About the Meteor Shower The Perseid meteor shower, which peaks in mid-August, is considered the best meteor shower of the year With swift and bright meteors, Perseids frequently leave long "wakes" of light and color behind them as they streak through Earth's atmosphere
  • Solar System Exploration
    The solar system has one star, eight planets, five dwarf planets, at least 290 moons, more than 1 3 million asteroids, and about 3,900 comets
  • RPS 3D Viewer - NASA Solar System Exploration
    NASA’s real-time science encyclopedia of deep space exploration Our scientists and far-ranging robots explore the wild frontiers of our solar system





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