Tags: 60 | billion | planets | alien | life

60 Billion Planets: Alien Life Could Be on Some, Says Study

Tuesday, 02 Jul 2013 08:19 AM

By Clyde Hughes

  Comment  |
   Contact Us  |
|  A   A  
  Copy Shortlink
We are not alone – at least in the number of planets in the Milky Way galaxy that could support life, according to new study conducted by University of Chicago and Northwestern University researchers.

As many as 60 billion planets orbiting "red dwarf stars" could be in the habitable zone for alien life, according to Astrophysical Journal Letters research that appeared last week. The study calculates the influence of cloud behavior on planets orbiting the dwarf stars, according to a University of Chicago news release.

"Most of the planets in the Milky Way orbit red dwarfs," said Nicolas Cowan, a postdoctoral fellow at Northwestern’s Center for Interdisciplinary Exploration and Research in Astrophysics. "A thermostat that makes such planets more clement means we don’t have to look as far to find a habitable planet."

Special: Should Gay Marriage Be Legal? Vote in Urgent Poll.

Cowan said habitable zones refer to the space around a star where orbiting planets can maintain liquid water. That, which had not changed in decades, largely neglects clouds, which exert a major climatic influence, said the news release.

"Clouds cause warming, and they cause cooling on Earth," said University of Chicago’s Dorian Abbot, co-author of the study said. Abbot is an assistant professor in geophysical sciences. "They reflect sunlight to cool things off, and they absorb infrared radiation from the surface to make a greenhouse effect. That’s part of what keeps the planet warm enough to sustain life."

The Times of India reported that NASA's Kepler Mission, which searches the Milky Way for planets in or near habitable zones, has identified approximately one Earth-size planet in the habitable zone of each red dwarf in the Milky Way. The University of Chicago-Northwestern study roughly doubles that estimate, according to the Times.

Cowan said for a planet to qualify as habitable in its study, it would have to be orbiting a star like the sun and complete that orbit approximately once a year. He said the planet must also be far enough away from its sun to maintain water.

Editor's Note: Get the Navy SEALs Cap – Celebrate Our Heroes

"If you’re orbiting around a low-mass or dwarf star, you have to orbit about once a month, once every two months to receive the same amount of sunlight that we receive from the sun," Cowan said in the news release.

Related stories:

Scientists Find Neighbor Star with 3 Planets in Life-friendly Orbits

Two Earth-Like 'Goldilocks' Planets Found Orbiting Distant Star

© 2014 Newsmax. All rights reserved.

  Comment  |
   Contact Us  |
  Copy Shortlink
Send me more news as it happens.
Get me on The Wire
Send me more news as it happens.
Around the Web
Join the Newsmax Community
Please review Community Guidelines before posting a comment.
>> Register to share your comments with the community.
>> Login if you are already a member.
blog comments powered by Disqus
Retype Email:
Zip Code:
Privacy: We never share your email.
Hot Topics
Follow Newsmax
Like us
on Facebook
Follow us
on Twitter
Add us
on Google Plus
Top Stories

Newsmax, Moneynews, and Independent. American. are registered trademarks of Newsmax Media, Inc. Newsmax TV, NewsmaxWorld, NewsmaxHealth, are trademarks of Newsmax Media, Inc.

America's News Page
©  Newsmax Media, Inc.
All Rights Reserved