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NASA’s Kepler probe reveals over 100 exoplanets

NASA’s Kepler probe on the K2 mission has revealed data which has led to the discovery of over 100 exoplanets. Some of these planets may even harbor life and are all larger than Earth by diameter. Kepler and the K2 mission discover new planets regularly.

  • Updated: July 20, 2016 12:05 AM IST
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Data from NASA‘s Kepler spacecraft on its K2 mission has revealed new worlds with over 100 exoplanets, some of which may harbor life. An international team of astronomers has confirmed this finding. Among the findings tallying 197 initial planet candidates, scientists have confirmed 104 planets outside our solar system. There is also a planetary system comprising four promising planets that could be rocky. Also Read - NASA’s Ingenuity Mars Helicopter uses same chip as Samsung Galaxy S5, OnePlus One

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The planets, all between 20 and 50 percent larger than Earth by diameter, are orbiting the M dwarf star K2-72, were found 181 light years away in the direction of the Aquarius constellation. The host star is less than half the size of the Sun and less bright. The planets’ orbital periods range from five and a half to 24 days, and two of them may experience irradiation levels from their star comparable to those on Earth.

“The K2 mission allows us to increase the number of small, red stars by a factor of 20, significantly increasing the number of astronomical ‘movie stars’ that make the best systems for further study,” said lead author Ian Crossfield from University of Arizona’s Lunar and Planetary Laboratory. Despite their tight orbits — closer than Mercury’s orbit around the Sun — the possibility that life could arise on a planet around such a star cannot be ruled out, he added in a paper published in the Astrophysical Journal Supplement Series.

ALSO READ: NASA announces next-generation Mars rover set for 2020 launch

Both Kepler and its K2 mission discover new planets by measuring the subtle dip in a star’s brightness caused by a planet passing in front of its star. In the spacecraft’s extended mission in 2013, it lost its ability to precisely stare at its original target area, but a brilliant fix created a second life for the telescope that is proving scientifically fruitful. After the fix, Kepler started its K2 mission which has provided an ecliptic field of view with greater opportunities for Earth-based observatories in both the northern and southern hemispheres.

ALSO READ: NASA s Juno mission sends first image of Jupiter and its moons

These observations represent a natural stepping stone from the K2 mission to NASA’s other upcoming exoplanet missions such as the Transiting Exoplanet Survey Satellite and James Webb Space Telescope. “This bountiful list of validated exoplanets from the K2 mission highlights the fact that the targeted examination of bright stars and nearby stars along the ecliptic is providing many interesting new planets,” added Steve Howell, project scientist for the K2 mission at NASA’s Ames Research Center in Moffett Field, California.

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  • Published Date: July 20, 2016 12:00 AM IST
  • Updated Date: July 20, 2016 12:05 AM IST



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