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>>

  • One person dead after hit & run in Spokane Valley

    One person dead after hit & run in Spokane Valley

    Tuesday, September 2 2014 1:02 PM EDT2014-09-02 17:02:36 GMT
    KHQ.COM - One person is dead after a hit and run near I-90 Park Rd. in Spokane Valley. It happened around 1:30 am on Tuesday. At this point police do not have a suspect description but are asking for anyone who may have witnessed the incident to call Crime Check at 509-456-2233.>>
    KHQ.COM - One person is dead after a hit and run near I-90 Park Rd. in Spokane Valley. It happened around 1:30 am on Tuesday. At this point police do not have a suspect description but are asking for anyone who may have witnessed the incident to call Crime Check at 509-456-2233.>>
  • VIRAL VIDEO: Holy Moly! This girl is definitely NOT afraid of spiders!

    VIRAL VIDEO: Holy Moly! This girl is definitely NOT afraid of spiders!

    Monday, September 1 2014 12:00 PM EDT2014-09-01 16:00:12 GMT
    KHQ.COM - You don't even know what this girl is about to do to prove she is definitely NOT afraid of spiders! Is she crazy or just fearless? Would you do this for $500? $1,000? $20,000? >>>WATCH>>>>>
    KHQ.COM - You don't even know what this girl is about to do to prove she is definitely NOT afraid of spiders! Is she crazy or just fearless? Would you do this for $500? $1,000? $20,000? >>>WATCH>>>>>
  • PHOTOS: Share your back-to-school pics!

    PHOTOS: Share your back-to-school pics!

    Tuesday, September 2 2014 12:18 PM EDT2014-09-02 16:18:59 GMT
    KHQ.COM - School is starting! Everyone knows the drill right? Before you can run out the door and jump on the bus, mom always has to snag a picture to remember her little baby growing up through the years! We want to see those photos! Whether they are from this year, last year or 50 years ago, send us the photos of your first day of school!>>
    KHQ.COM - School is starting! Everyone knows the drill right? Before you can run out the door and jump on the bus, mom always has to snag a picture to remember her little baby growing up through the years! We want to see those photos! Whether they are from this year, last year or 50 years ago, send us the photos of your first day of school!>>