Illinois Outdoors at PrairiestateOutdoors.com
RulesIllinois Outdoors at PrairiestateOutdoors.com

Prairie State Outdoors Categories

Top Story :: Opinion :: Illinois Outdoor News :: Fishing News :: Hunting News :: Birding News :: Nature Stories :: Miscellaneous News :: Fishing :: Big Fish Fridays :: Big Fish Stories :: State Fishing Reports :: Other Fishing Reports :: Fishing Tips, Tactics & Tales :: Where to Fish :: Fishing Calendar :: Hunting :: Hunting Reports :: Hunting Tips, Tactics & Tales :: Where to Hunt :: Tales from the Timber :: Turkey Tales :: Hunting Calendar :: Big Game Stories :: Nature and Birding :: Birding Bits :: Nature Newsbits :: Critter Corner :: Birding Calendar :: Stargazing :: In the Wild :: Miscellaneous Reports and Shorts :: Links :: Hunting Links :: Birding Links :: Video ::

Big Buck Stories

1960s :: 1980s :: 1991-92 :: 1992-93 :: 1993-94 :: 1994-95 :: 1995-96 :: 1997-98 :: 1998-99 :: 1999-2000 :: 2000-01 :: 2001-02 :: 2003-04 :: 2004-05 :: 2005-06 :: 2006-07 :: 2007-08 :: 2008-09 :: 2009-10 :: 2010-11 :: 2011-12 :: 2012-13 ::

Scattershooting

Flathead's Picture of the Week :: Big bucks :: Birdwatching :: Cougars :: Dogs :: Critters :: Fishing :: Asian carp :: Bass :: Catfish :: Crappie :: Ice :: Muskie :: Humor :: Hunting :: Deer :: Ducks :: Geese :: Turkey :: Upland game :: Misc. :: Mushrooms :: Open Blog Thursday :: Picture A Day 2010 :: Plants and trees :: Politics :: Prairie :: Scattershooting :: Tales from the Trail Cams :: Wild Things ::


Print
Illinois hunting and fishing

This artist rendering released Monday Jan. 7,2013 by Harvard-Smithsonian Center for Astrophysics shows the different types of planets in our Milky Way galaxy detected by NASA’s Kepler spacecraft. A new analysis of Kepler data found there are at least 17 billion planets the size of Earth. (AP Photo/Harvard-Smithsonian Center for Astrophysics)

Stargazing: Billions of Earth-size planets in Milky Way

January 10, 2013 at 11:07 AM

The Associated Press

LOS ANGELES (AP) — Our Milky Way is home to at least 17 billion planets that are similar in size to Earth, a new estimate suggests. That’s more than two Earth-size planets for every person on the globe.

Just how many are located in the sweet spot where water could exist is “simply too early to call,” said Francois Fressin of the Harvard-Smithsonian Center for Astrophysics, who presented his work at an astronomy meeting Monday.

It’s the first reliable tally of the number of worlds outside the solar system that are the size of Earth, but the hunt for our twin is far from over.

Despite the explosion of exoplanet discoveries in recent years, one find remains elusive: A planet that’s not only the right size but also in the so-called Goldilocks zone where it’s not too hot or too cold for water to be in liquid form on the surface.

The sheer number of Earth-size planets gives astronomers a starting point to narrow down which ones are in the habitable zone.

Fressin and his team came up with their figure by conducting a fresh analysis of data collected by NASA’s Kepler spacecraft, which was launched in 2009 to track down other Earths. They estimated at least one in six stars in the galaxy hosts a planet the size of ours, translating to at least 17 billion Earth-size worlds.

Using a different method, a team from the University of California, Berkeley and University of Hawaii separately came up with a similar estimate. They calculated 17 percent of distant stars have planets that are the same size as Earth or slightly larger.

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

Meanwhile, the Kepler spacecraft continues to spot planets as they pass between Earth and the star they orbit. It found 461 new candidate planets, bringing the total to 2,740 potential planets, said mission scientist Christopher Burke at the SETI Institute.

Most of the new Kepler finds were driven by discoveries of Earth-size planets and super-Earths. Four of those are thought to reside in the Goldilocks zone, but more observations are needed.

Fressin said it’s clear that rocky planets abound outside the solar system.

“If you look up on a starry night, each star you’re looking at — almost each one of them — has a planetary system,” Fressin said.

___

Follow Alicia Chang at http://twitter.com/SciWriAlicia

___

Online:

Kepler mission: http://www.nasa.gov/kepler


Copyright 2013 The Associated Press.

Your CommentsComments :: Terms :: .(JavaScript must be enabled to view this email address)

Comment Area Pool Rules

  1. Read our Terms of Service.
  2. You must be a member. :: Register here :: Log In
  3. Keep it clean.
  4. Stay on topic.
  5. Be civil, honest and accurate.
  6. .(JavaScript must be enabled to view this email address)

Log In

Register as a new member

Next entry: Stargazing: Scientists examine Martian meteor found in Sahara

Previous entry: Two Louisiana cops,  jail guard allegedly spotlighted doe

Log Out

RSS & Atom Feeds

Prairie State Outdoors
PSO on Facebook
Promote Your Page Too

News Archives

September 2017
S M T W T F S
          1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
Copyright © 2007-2014 GateHouse Media, Inc.
Some Rights Reserved
Original content available for non-commercial use
under a Creative Commons license, except where noted.
Creative Commons