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Milky Way Has at Least 17 Billion Earth-Size Planets


Science & Tech  (tags: astronomy, research, nasa, science, space, Earth, discovery, technology )

Michael
- 718 days ago - cbc.ca
Astronomers hunting for Earth-like planets now have many places to look. A new estimate released Monday suggested the Milky Way galaxy is home to at least 17 billion planets similar in size to our planet.



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Comments

Michael O. (175)
Monday January 7, 2013, 6:25 pm
It doesn't mean all are potentially habitable, but the sheer number of Earth-size planets is a welcome starting point in the search for worlds like our own.

Scientists have yet to find a twin Earth one that's not only the right size but also located in the so-called Goldilocks zone, a place that's not too hot and not too cold where water might exist in liquid form.

Two independent groups came up with the new estimate after a fresh analysis of data gathered by NASA's Kepler spacecraft, launched in 2009 to track down other Earths. The craft spots a planet when it passes in front of its star.

One team led by Francois Fressin of the Harvard-Smithsonian Center for Astrophysics estimated at least one in six stars has an Earth-size planet orbiting it.

Using a different method, researchers at the University of California, Berkeley and University of Hawaii determined 17 per cent of stars host planets that are one to two times the diameter of Earth.

The findings were presented at the American Astronomical Society in Long Beach.

 

Roseann d. (178)
Monday January 7, 2013, 6:30 pm
and maybe some are already occupied. Keep them clean and pristine. Keep humans out.
 

greenplanet e. (157)
Monday January 7, 2013, 6:42 pm
Wow!
 

Terry V. (30)
Monday January 7, 2013, 7:20 pm
Amazing, thanks
 

Roger Garin-michaud (115)
Tuesday January 8, 2013, 3:04 pm
noted, thanks !
 

Kenneth L. (314)
Wednesday January 9, 2013, 6:33 am
Thanks Michael. Only humans could be so egocentric to think with the super number of planets in galaxies and super numbers of galaxies themselves they could be the 'only ones'. And yet hundreds of millions of people loved Star Wars...but of course that was only 'science fiction'. A nice little phrase to keep away any thoughts of any possible reality of other beings somewhere else in the universe.
 

Suzanne L. (142)
Wednesday January 9, 2013, 8:35 am
Fascinating. TY
 

LMj Sunshine (144)
Wednesday January 9, 2013, 1:00 pm
Awesome, thank you!
 

Nelson Baker (0)
Wednesday January 9, 2013, 1:56 pm
Thank you.
 

caroline s. (79)
Thursday January 10, 2013, 2:20 am
Fascinating.
 

Jennifer C. (169)
Thursday January 10, 2013, 8:56 pm
Thank you.
 

g d c. (0)
Saturday January 12, 2013, 5:43 pm
ty
 

Melania Padilla (185)
Monday January 14, 2013, 10:16 am
Thanks for posting!
 

Klaus Peters (13)
Friday January 25, 2013, 5:04 am
I do believe in afterlife and it may very well be on another planet similar to ours, a concious transfer of our souls and rebirth, hopefully a better life.
 
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