Planet Like 'Star Wars' Tatooine Discovered Orbiting 2 Suns

**Behemoth24** · 09-15-2011, 09:45 PM

Don't know if this has been posted before.

Planet Like 'Star Wars' Tatooine Discovered Orbiting 2 Suns - Yahoo! News

It's a real-life Tatooine. A spectacle made popular by the "Star Wars" saga — a planet with two suns — has now been confirmed in space for the first time, astronomers revealed.
Scientists using NASA's Kepler space telescope captured details of a giant planet in orbit around the pair of binary stars that make up the Kepler-16 system, which is about 200 light-years away.
"This discovery is stunning," said study co-author Alan Boss at the Carnegie Institute in Washington. "Once again, what used to be science fiction has turned into reality." [See an image and video of Tatooine planet Kepler 16b]
When Tatooine was depicted on film, many scientists doubted that such planets could really exist. Now there's proof.
"It's possible that there's a real Tatooine out there," said John Knoll, visual effects supervisor at the special-effects firm Industrial Light and Magic, which was behind the "Star Wars" films. "Kepler 16b is unambiguous and dramatic proof that planets really do form around binaries."
The new discovery is expanding the bounds of what scientists, as well as filmakers, can conceive, he said.
"Again and again we see that the science is stranger and cooler than fiction," Knoll said during a NASA press conference today. "The very existence of these discoveries gives us cause to dream bigger, to question our assumptions."
The planet, dubbed Kepler-16(AB)-b, passes in front of both stars in view of the satellite, regularly dimming their light. Each star also eclipses its companion as they orbit each other. Altogether, these motions allow scientists to precisely calculate the masses, radii and trajectories of all three bodies.
The newfound planet keeps a distance from its stars nearly three-quarters that of the distance between the Earth and the sun. It is somewhat like Saturn in size, although nearly 50 percent denser, suggesting it is richer in heavy elements. [10 Real Alien Worlds That Could Be In 'Star Wars']
"Kepler-16(AB)-b is not habitable as we know it," said study lead author Laurance Doyle , an astrophysicist at the Search for Extraterrestrial Intelligence (SETI) Institute in Mountain View, Calif.
This alien world travels on a nearly circular 229-day orbit around its two parent stars, Kepler-16A and Kepler-16B, which are about 69 and 20 percent as massive as the sun, respectively. The stars keep close to each other — only a fifth of the distance between Earth and the sun on average, which is closer than Mercury gets to the sun — completing an orbit around each other every 41 days, researchers added. [Infographic: New Planet is Like "Star Wars'" Tatooine]
Worlds that orbit around two stars, known as circumbinary planets, had been hinted at before. Stars in pairs both orbit around a point in space called barycenter, and researchers at times saw these orbits were slightly off, suggesting the presence of a planet tugging at both stars. However, Kepler-16(AB)-b is the first planet that scientists have detected directly passing in front of, or transiting, its stars, temporarily dimming their light.
Since the movements of this world and its two stars are all virtually confined to the same plane, the researchers suggest they all formed from the same disk of dust and gas. Planets that were captured from other star systems might be expected to orbit at a range of angles.
"Now that we know how to detect circumbinary planets, I think we are going to find a lot more rapidly," Doyle told SPACE.com.
The scientists detailed their findings in the Sept. 16 issue of the journal Science.

**Eye Believe** · 09-15-2011, 10:00 PM

"Scientists at NASA and the Search for Extraterrestrial Intelligence Institute [SETI] are informally calling the newly discovered world Tatooine, as homage to Skywalker's planet imagined by George Lucas."

"The so-called circumbinary planet has been dubbed with an official name that's much less interesting: Kepler-16b."

'Tatooine' gives first direct proof of 2-sun planet – Light Years - CNN.com Blogs

Enjoy/ Welcome ;]

Also. watch the vid in the link ;D

**te_lanus** · 09-15-2011, 11:55 PM

ept. 15, 2011: The existence of a world with a double sunset, as portrayed in the film Star Wars more than 30 years ago, is now scientific fact. NASA's Kepler mission has made the first unambiguous detection of a circumbinary planet -- a planet orbiting two stars -- 200 light-years from Earth.

Unlike Star Wars’ Tatooine, the planet is cold, gaseous and not thought to harbor life, but its discovery demonstrates the diversity of planets in our galaxy. Previous research has hinted at the existence of circumbinary planets, but clear confirmation proved elusive. Kepler detected such a planet, known as Kepler-16b, by observing transits, where the brightness of a parent star dims from the planet crossing in front of it.

"This discovery confirms a new class of planetary systems that could harbor life," Kepler principal investigator William Borucki said. "Given that most stars in our galaxy are part of a binary system, this means the opportunities for life are much broader than if planets form only around single stars. This milestone discovery confirms a theory that scientists have had for decades but could not prove until now."

A research team led by Laurance Doyle of the SETI Institute in Mountain View, Calif., used data from the Kepler space telescope, which measures dips in the brightness of more than 150,000 stars, to search for transiting planets. Kepler is the first NASA mission capable of finding Earth-size planets in or near the "habitable zone," the region in a planetary system where liquid water can exist on the surface of the orbiting planet.

Scientists detected the new planet in the Kepler-16 system, a pair of orbiting stars that eclipse each other from our vantage point on Earth. When the smaller star partially blocks the larger star, a primary eclipse occurs, and a secondary eclipse occurs when the smaller star is occulted, or completely blocked, by the larger star.

Astronomers further observed that the brightness of the system dipped even when the stars were not eclipsing one another, hinting at a third body. The additional dimming in brightness events, called the tertiary and quaternary eclipses, reappeared at irregular intervals of time, indicating the stars were in different positions in their orbit each time the third body passed. This showed the third body was circling, not just one, but both stars, in a wide circumbinary orbit.

he gravitational tug on the stars, measured by changes in their eclipse times, was a good indicator of the mass of the third body. Only a very slight gravitational pull was detected, one that only could be caused by a small mass. The findings are described in a new study published Friday, Sept. 16, in the journal Science.

"Most of what we know about the sizes of stars comes from such eclipsing binary systems, and most of what we know about the size of planets comes from transits," said Doyle, who also is the lead author and a Kepler participating scientist. "Kepler-16 combines the best of both worlds, with stellar eclipses and planetary transits in one system."

This discovery confirms that Kepler-16b is an inhospitable, cold world about the size of Saturn and thought to be made up of about half rock and half gas. The parent stars are smaller than our sun. One is 69 percent the mass of the sun and the other only 20 percent. Kepler-16b orbits around both stars every 229 days, similar to Venus’ 225-day orbit, but lies outside the system’s habitable zone, where liquid water could exist on the surface, because the stars are cooler than our sun.

"Working in film, we often are tasked with creating something never before seen," said visual effects supervisor John Knoll of Industrial Light & Magic, a division of Lucasfilm Ltd., in San Francisco. "However, more often than not, scientific discoveries prove to be more spectacular than anything we dare imagine. There is no doubt these discoveries influence and inspire storytellers. Their very existence serves as cause to dream bigger and open our minds to new possibilities beyond what we think we 'know.'"

Source: Kepler Discovers a Planet with Two Suns - NASA Science

**neilaufo** · 09-16-2011, 06:08 AM

Thank you Beheemoth24, this news item has just appeared in our local paper today, but your quote must be the full length version, as the one in the West Australian Newspaper (16/09/11) was only a few lines, so appreciated reading the extra details.

NeilaUFO