From Kepler: Dozens of Earths in the habitable zone


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At a press conference today the science team at Kepler announced a swath of new discoveries from the space telescope, all of which point to the impending discovery of multiple Earth-like planets capable of harboring life.

  • The confirmation of a rocky planet 2.4 times the mass of the Earth in the habitable zone of a star, with an orbit 290 days long. Though the planet, Kepler-22B, is slightly closer to its star than the Earth, the star, a G star like our sun and six hundred light years away, is also slightly dimmer. The scientists estimate that the planet’s average surface temperature would be approximately 72 degrees Fahrenheit!
  • The telescope now has more than 2326 planet candidates, with 207 approximately Earth-size, 680 super Earth-size, 1,181 Neptune-size, 203 Jupiter-size, and 55 larger than Jupiter.
  • Of these, 48 candidate planets are considered to be in the habitable zone, 10 of which are approximately Earth-sized. Five of these are considered “very robust candidates,” according to Natalie Batalha of the Kepler team. “Many of these planets could harbor life,” added project scientist Bill Borucki.

Because of the significance of this new Kepler data, the SETI Institute has been using the Allen Telescope Array to focus its search to these planets in particular, looking for any evidence of intelligent radio signals.

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2 comments

  • Chris Kirkendall

    If I recall correctly, less than 2 years ago, someone predicted we’d confirm at least one Earth-size planet in the habitable zone within 5 years – obviously, it’s happened a lot faster than that. The way things are going, it may not be long before we identify an Earth-size planet, within the habitable zone, with Earth-like characteristics – an O2-rich atmosphere & liquid water, which would theoretically make it ideal for life. Exciting stuff…

  • I’d come to give the go-ahead with you here. Which is not something I typically do! I love reading a post that will make people think. Also, thanks for allowing me to comment!

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