Most Earth-Like Alien Planet Possibly Found - Spokane, North Idaho News & Weather KHQ.com

Most Earth-Like Alien Planet Possibly Found

Posted: Updated:

YAHOO.COM - A possible alien planet discovered by NASA's Kepler space telescope is the most Earth-like world yet detected beyond our solar system, scientists say.

With a radius that is just 1.5 times that of Earth, the potential planet is what a so-called "super-Earth," meaning it is just slightly larger than the Earth. The candidate planet orbits a star similar to the sun at a distance that falls within the "habitable zone" — the region where liquid water could exist on the planet's surface. Scientists say the planet, if confirmed, could be a prime candidate to host alien life.

"This was very exciting because it's our fist habitable-zone super Earth around a sun-type star," astronomer Natalie Batalha, a Kepler co-investigator at NASA's Ames Research Center in Moffett Field, Calif., said Tuesday (Jan. 8) here at the 221st meeting of the American Astronomical Society.

The find could be the closest so far to an Earth twin beyond the solar system, she said. The object's host star is a G-type star just slightly cooler than our own sun. [17 Billion Earths in the Milky Way (Infographic)]

"It's orbiting a star that's very much like our sun," Batalha added. "Previously the ones we saw were orbiting other types of stars."

The object takes 242 days to orbit its star (compared to Earth's 365 days) and is about three-quarters of the Earth-sun distance from its parent. The Earth orbits 93 million miles (150 million kilometers) from the sun on average, a distance known as 1 astronomical unit.

"It's a big deal," astrophysicist Mario Livio, of the Space Telescope Science Institute in Baltimore, told SPACE.com. "It's definitely a good candidate for life."

Based on its characteristics, the possible planet may or may not be rocky, but it certainly has the possibility of liquid water.

"Maybe there's no land life, but perhaps very clever dolphins," Livio joked.

The possible planet is called KOI 172.02 (KOI stands for Kepler Object of Interest, a designation assigned to all planet candidates found by the telescope until they are confirmed as planets). The discovery was announced at the meeting Monday (Jan. 7) by Christopher Burke of the SETI Institute as part of a batch of 461 new planet candidates found by Kepler.

Kepler finds potential planets by looking for periodic dips in the brightness of stars caused by planets passing in front of them, blocking some of their light. Astronomers have multiple ways to confirm that these candidates are actual planets, such as looking for small variations in the timing of the planets' passes in front of stars caused by the gravitational tug of other planets in the system.

Kepler launched in 2009 and was recently granted an extended mission until at least 2016. The telescope has detected 2,740 candidate planets thus far. While just 105 of them have been confirmed to date, Kepler scientists estimate that more than 90 percent will end up being the real deal.

"There is no better way to kick off the start of the Kepler extended mission than to discover more possible outposts on the frontier of potentially life-bearing worlds," Burke said in a statement.

  • Most Popular StoriesMost Popular StoriesMore>>

  • PHOTOS: Flash flooding & mudslides trap people in Okanogan County

    PHOTOS: Flash flooding & mudslides trap people in Okanogan County

    Friday, August 22 2014 9:12 PM EDT2014-08-23 01:12:14 GMT
    OKANOGAN COUNTY, Wash.- Okanogan County Sheriff Frank Rogers tells KHQ that as of 5:00pm Friday evening, Highway 20 is back open and no homes are threaten after numerous mudslides washed out roads and stranded drivers Thursday night and Friday morning. >>
    OKANOGAN COUNTY, Wash.- Okanogan County Sheriff Frank Rogers tells KHQ that as of 5:00pm Friday evening, Highway 20 is back open and no homes are threaten after numerous mudslides washed out roads and stranded drivers Thursday night and Friday morning. >>
  • PHOTOS: CASH REWARD offered for information leading to the arrest of these FUGITIVES

    PHOTOS: CASH REWARD offered for information leading to the arrest of these FUGITIVES

    Friday, August 22 2014 7:41 PM EDT2014-08-22 23:41:09 GMT
    SPOKANE, Wash. - Crime Stoppers of the Inland Northwest is offering cash rewards for any information leading to the arrest of the fugitives listed on their website as of August 21, 2014. If you recognize any of these fugitives, you are asked call 1-800-222 TIPS.>>
    SPOKANE, Wash. - Crime Stoppers of the Inland Northwest is offering cash rewards for any information leading to the arrest of the fugitives listed on their website as of August 21, 2014. If you recognize any of these fugitives, you are asked call 1-800-222 TIPS.>>
  • Dog recovering from gun shots looks for loving home

    Dog recovering from gun shots looks for loving home

    Friday, August 22 2014 5:00 PM EDT2014-08-22 21:00:29 GMT
    SPOKANE, Wash. - Just for a second, forget everything you think you know about Pit Bulls. Forget that you think they are vicious or that you've heard they attack children. Approaching this story with an open mind might just change your opinion of what can actually be a very sweet, people-loving breed. A very special pit bull is lucky to be alive after enduring two gun shot wounds and abuse that left her blind in one eye.>>
    SPOKANE, Wash. - Just for a second, forget everything you think you know about Pit Bulls. Forget that you think they are vicious or that you've heard they attack children. Approaching this story with an open mind might just change your opinion of what can actually be a very sweet, people-loving breed. A very special pit bull is lucky to be alive after enduring two gun shot wounds and abuse that left her blind in one eye.>>