Skip to comments.New Estimate for Alien Earths: 2 Billion in Our Galaxy Alone
Posted on 03/22/2011 4:21:35 PM PDT by LibWhacker
Roughly one out of every 37 to one out of every 70 sunlike stars in the sky might harbor an alien Earth, a new study reveals.
These findings hint that billions of Earthlike planets might exist in our galaxy, researchers added.
These new calculations are based in data from the Kepler space telescope, which in February wowed the globe by revealing more than 1,200 possible alien worlds, including 68 potentially Earth-size planets. The spacecraft does so by looking for the dimming that occurs when a world transits or moves in front of a star.
Scientists at NASA's Jet Propulsion Laboratory in Pasadena, Calif., focused on roughly Earth-size planets within the habitable zones of their stars that is, orbits where liquid water can exist on the surfaces of those worlds. [The Strangest Alien Planets]
After the researchers analyzed the four months of data in this initial batch of readings from Kepler, they determined that 1.4 to 2.7 percent of all sunlike stars are expected to have Earthlike planets ones that are between 0.8 and two times Earth's diameter and within the habitable zones of their stars.
"This means there are a lot of Earth analogs out there two billion in the Milky Way galaxy," researcher Joseph Catanzarite, an astronomer at NASA's Jet Propulsion Laboratory, told SPACE.com. "With that large a number, there's a good chance life and maybe even intelligent life might exist on some of those planets. And that's just our galaxy alone there are 50 billion other galaxies."
After three to four years of Kepler data are investigated, the scientists predict a total of 12 Earthlike worlds will be found. Four of these have already been seen in the four months of data released so far, they added. Kepler mission scientists have estimated that, altogether, there could be 50 billion planets in the Milky Way, though not all would be Earth-size worlds within the habitable zone of their local stars. [NASA's Kepler Telescope By-The-Numbers]
When it comes to the 100 nearest sunlike stars within a few dozen light years, these findings suggest that only about two might have Earthlike worlds. Still, Catanzarite did note that red dwarfs might host Earthlike planets as well, and that such stars are far more common than sunlike stars.
Although researchers will find it much harder to detect an Earth-size planet transiting in front of dim red dwarfs, scientists are currently trying to detect such planets around these stars by the gravitational tugs they would exert on each other.
"I'd expect to hear one day about habitable Earth analogs around these stars," Catanzarite said.
Catanzarite and his colleague Michael Shao detailed their findings online March 8 in a paper submitted to the Astrophysical Journal.
Illegal aliens, Earth Aliens, WHAT the difference! NONE!
I think they have taken over the TV.
People seem to confuse speculation with acknowledgment of reality.
And Sammy Hager
Ever see the movie Casablanca?? Well, that’s how aliens use Earth.
Most are like you and me. They are just trying to make a living.Many are NYC cab drivers and others are in the NBA.
Elvis Presley was an Alien but he did not die,he just went home.
Cool. I think it won’t be a bad thing when every little group can have their own planet. Israel can have one, the gun hating liberal maniacs can have one where they can tax themselves into penury, the decent Americans can have one, and etc.
Naturally, the muslims will still want to kill everyone.
“People seem to confuse speculation with acknowledgment of reality.”
Been watching too much CNN lately, huh?
They fight the small dinosaurs and each other endlessly.
Can we send odumbo to be president of one of the other ones?
If you send the Libtards to Dinotopia naked and with no industrial implements whatsoever so that they can be one with nature I’d be happy. Likely too, the dinosaurs would thank you for the food.
Sorry, no. There may be billions of other planets, some supporting life. There may not. CNN viewers will equate the speculation with certainty by presumption. Then they’ll demand that government implement policies based upon it.
It isn’t called INFINITY for NOTHING!!
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Or bad news...
“Roughly one out of every 37 to one out of every 70 sunlike stars in the sky MIGHT harbor an alien Earth, a new study reveals.”
“These findings hint that billions of Earthlike planets MIGHT exist in our galaxy, researchers added.”
Might, maybe, potential, possible, but in the end - no one knows if life exists anywhere else. Sounds like wishful thinking - or, more probable, an appeal for more federal funding.
For example, the liberal view of most of us here. . .
Just because a planet is in the right place and has the right elements does not guarantee life. Unless you believe in evolution.
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