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Dr.Ashok Chugh ( Ex Amc )
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On 24 July 2015 at 23:53, Mohamed Jaffer <mjkassam@gmail.com> wrote:
> NASA discovers Earth-like planet in 'habitable zone'
>
> NASA astronomers announced Thursday that they had
> found an Earth-like planet roughly 1,400 light years away.
> Other planets, such as Kepler-186f, have been discovered in this sweet
> Goldilocks spot that is neither too close nor too far to potentially sustain
> The newly discovered Kepler-452b, which is in the Cygnus constellation,
> orbits a star from what is called the habitable zone: the distance at which
> water can pool on the surface of a planet.
> sustain life. But Kepler-452b is different because it circles a G2-type star
> — just like our sun.
> "There's really one place that we know has life in the universe, and that's
> Earth, so finding another planet around a star that's very similar to our
> sun is quite exciting," NASA astronomer Jeff Coughlin said in an interview
> with Yahoo News.
> The scientists are not necessarily saying that other types of stars, such as
> M-dwarfs, cannot sustain life. But there are many unknown factors about what
> sort of role they would play in creating or preventing it.Kepler-452b is
> roughly 60 percent larger in diameter than Earth but still has a good chance
> of being rocky like Earth rather than spacious like Neptune or Jupiter,
> according to NASA.
> The Kepler spacecraft was launched in 2009 to collect and transmit data on
> potential Earth-like planets.
> Coughlin, a Kepler scientist at the SETI Institute in Mountain View, Calif.,
> explained that signs of periodic dimming and brightening are the first clues
> of a potential planet.
> "The second step is to really delve in deep to the Kepler data itself," he
> said. "Take a really hard look and rule out all of the other possibilities
> of what could be causing the signal."
> At that point, Coughlin said, the scientists consider the object of study a
> "planet candidate," but official confirmation relies on additional data
> outside of Kepler.
> "They used ground-based telescopes to really observe the star better and
> rule out the remaining scenarios," he said. "That's when you call it
> confirmed. At the 99 percent level, this has to be a planet."
> The ground-based observations were conducted at the McDonald Observatory at
> the University of Texas at Austin, the Fred Lawrence Whipple Observatory on
> Arizona's Mt. Hopkins and the W.M. Keck Observatory on Hawaii's Mauna Kea.
> At a Thursday news conference in Cape Canaveral, Fla., scientists announced
> the discovery of Kepler-452b and 11 small new candidate planets that are in
> the habitable zone.
> The research paper reporting the team's findings will appear in an upcoming
> issue of The Astronomical Journal.
> "We've been analyzing the data as we got it from Kepler. And we've been
> finding planets that are closer and closer to being very much like the
> Earth," Coughlin said. "Kepler-452b is the next step. It's the closest we
> have. But the story is still going on."
>
> NASA: This planet could be 'Earth 2.0′
>
>
> Related Stories
>
> NASA's Kepler Mission Discovers Bigger, Older Cousin to Earth PR Newswire
> Astronomers discover most Earth-like planet yet Reuters
> NASA finds a planet that could be like Earth MarketWatch
> NASA Discovers the First Earth-Sized Planet in Habitable Zone of Sun-Like
> Star GameSpot
> NASA's Kepler Mission Discovers Earth's 'Cousin' Huffington Post
>
> http://hsrd.yahoo.com/_ylt=A86.JrtLjbFV0CcBsGObvZx4;_ylu=X3oDMTQwdmVjZWU1BGJwb3MDMQRjY29kZQNyZGNhYjUEY3BvcwMxBGN0AzEEZwM0NzE1NGNhZC1hOWRmLTM3OTktODJkNC03MTQ4N2QxMmVkZTYEaW50bAN1cwRpdGMDMARwa2d0AzQEcG9zAzEEc2VjA3RkLXN0cm0Ec2xrA3RpdGxlBHRlc3QDNzAw/RV=1/RE=1438909003/RH=aHNyZC55YWhvby5jb20-/RO=2/RU=aHR0cDovL25ld3MueWFob28uY29tL25hc2EtcGxhbmV0LWNvdWxkLWVhcnRoLTItMC0xNzQ3MDYzMTUuaHRtbA--/RS=%5EADAWT.V43XRsd0_JxkYJJJ5dxIJOO4-
>
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