100 billion alien planets fill our galaxy
2013 01 03

From: NBCNews.com



Our Milky Way galaxy is home to at least 100 billion alien planets, and possibly many more, a new study suggests.

"It’s a staggering number, if you think about it," lead author Jonathan Swift, of Caltech in Pasadena, said in a statement. "Basically there’s one of these planets per star."

Swift and his colleagues arrived at their estimate after studying a five-planet system called Kepler-32, which lies about 915 light-years from Earth. The five worlds were detected by NASA’s Kepler Space Telescope, which flags the tiny brightness dips caused when exoplanets cross their star’s face from the instrument’s perspective.

The Kepler-32 planets orbit an M dwarf, a type of star that is smaller and cooler than our sun. M dwarfs are the most common star in the Milky Way, accounting for about 75 percent of the galaxy’s 100 billion or so stars, researchers said.

Further, the five Kepler-32 worlds are similar in size to Earth and orbit quite close to their parent star, making them typical of the planets Kepler has spotted around other M dwarfs. So the Kepler-32 system should be representative of many of the galaxy’s planets, scientists said. [The Strangest Alien Planets (Gallery)]

"I usually try not to call things ’Rosetta stones,’ but this is as close to a Rosetta stone as anything I’ve seen," said co-author John Johnson, also of Caltech. "It’s like unlocking a language that we’re trying to understand — the language of planet formation."

[...]


Read the full article at: msn.com






Related Articles
Lost in space: The ’homeless planet’ found floating without a star to orbit
Japanese Man Auctions Off Planet Earth
Newfound ’Tatooine’ Alien Planet Bodes Well for E.T. Search


Latest News from our Front Page

A Look at Theories About Elongated Skulls in Ancient Peru, Europe, Egypt
2014 07 31
Elongated skulls have been found in ancient burial grounds around the world. Many are the result of a practice of intentionally deforming the skull with binding applied during the early years of a child’s life. Some may be explained by natural deformity. Yet enough mystery is left in relation to some of the skulls for various theories to arise. Could the ...
EU on high alert as Germany accepts Ebola patients
2014 07 30
A German hospital has agreed to treat Ebola patients amid widespread fears of a possible outbreak of the deadly disease in Europe. Over 670 people have already been killed by the disease in West Africa with doctors struggling to control the epidemic. A German hospital in Hamburg agreed to accept patients following a request from the World Health Organization (WHO), Deutsche ...
Bolivia declares Israel terrorist regime
2014 07 30
Bolivia has declared Israel a “terrorist state” and revoked a visa exemption agreement with Tel Aviv in protest at the ongoing Israeli attacks on the besieged Gaza Strip. The move "means, in other words, we are declaring (Israel) a terrorist state," President Evo Morales said during talks with a group of educators in the city of Cochabamba ...
Pagan Traditions: Mysteries of medieval graffiti in England’s churches
2014 07 30
Medieval graffiti of straw kings, pentagrams, crosses, ships and "demon traps" have been offering a tantalising glimpse into England’s past. What do the pictures reveal about life in the Middle Ages? A project to record the graffiti, which began in Norfolk, has now been rolled out to other areas and is gradually spreading across England. Armed with just a torch and a ...
More Gigantic Holes Appear in Siberia’s ’End of the World’
2014 07 30
Is it the end of the world in Siberia’s ’End of the World’? Scientists suspect not, but they’re still investigating the strange and alarming holes that are swallowing up the Siberian north. This week two new holes have been discovered, and with similar characteristics as the first reported hole: a very deep shaft with smooth sides, debris surrounding the rim, and water ...
More News »