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  • Narrator: NASA's Kepler Mission has discovered the

  • first near-Earth-size planet orbiting in the

  • habitable zone of a star very similar to our Sun.

  • Located about 1,400 light-years from Earth in the

  • constellation of Cygnus, the newly discovered

  • planet resides in the Kepler-452 system.

  • The planet, called Kepler-452B, is about

  • 60 percent larger than Earth.

  • While its mass and composition are not known,

  • researchers believe that it is likely

  • to be a rocky world.

  • The host star of Kepler-452B is the same

  • G-type as our Sun.

  • It is 6 billion years old, 1.5 billion years older

  • than our Sun and is 10 percent larger and

  • 20 percent brighter.

  • Kepler-452B receives only 10 percent more energy

  • from its star than the Earth does from the Sun.

  • Since the Kepler mission was launched in 2009,

  • it has identified 4,696 planet candidates,

  • one thousand of which have been confirmed as planets.

  • Of those confirmed, 12 are near-Earth-size and in

  • the habitable zone of their star.

  • The mission has provided data that has helped to

  • redefine our understanding of stars and planetary systems in our galaxy.

  • Researchers will use this data to continue to make

  • discoveries for years to come.

  • (Electronic Sounds of Data) (Musical Tones)

Narrator: NASA's Kepler Mission has discovered the

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B1 中級

NASAのケプラー探査機が地球の大きないとこを発見 (NASA’s Kepler Mission Discovers Bigger, Older Cousin to Earth)

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    Chamber に公開 2021 年 01 月 14 日
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