This artist's concept illustrates Kepler-47, the first transiting circumbinary system. Credit: NASA/JPL-Caltech/T. Pyle
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NASA says it has discovered two planets orbiting two suns, similar to Luke Skywalker's fictional home world of Tatooine in Star Wars.
It could help in the search for alien life.
The solar system is 4,900 light-years from Earth in the constellation Cygnus.
Astronomers detected two planets in the Kepler-47 system, a pair of orbiting stars that eclipse each other every 7.5 days. Scientists say that one star is similar to the sun in size and the other is about one-third the size of the sun and less than 1 percent as bright.
The inner planet, Kepler-47b, orbits the pair of stars in less than 50 days. While it cannot be directly viewed, it is thought to be a sweltering world, where the destruction of methane in its super-heated atmosphere might lead to a thick haze that could blanket the planet.
The outer planet orbits its host pair every 303 days, placing it in the so-called "habitable zone," the region in a planetary system where liquid water might exist on the surface of a planet. It is not believed to be hospitable for life.
William Borucki, Kepler mission principal investigator says, "In our search for habitable planets, we have found more opportunities for life to exist."
To search for transiting planets, the research team used data from the Kepler space telescope, which measures dips in the brightness of more than 150,000 stars.
"The presence of a full-fledged circumbinary planetary system orbiting Kepler-47 is an amazing discovery," said Greg Laughlin, professor of Astrophysics and Planetary Science at the University of California in Santa Cruz.
The scientists published their findings online Aug. 28 in the journal Science.
The discovery shows that planetary systems can survive even in the chaotic environment around binary stars. Researchers now want to look for smaller alien planets around binary stars.
Sunday, May 19 2013 6:53 PM EDT2013-05-19 22:53:31 GMT
Some lucky person walked into a Publix supermarket in suburban Florida over the past few days and bought a ticket now worth an estimated $590.5 million — the highest Powerball jackpot in history.
Some lucky person walked into a Publix supermarket in suburban Florida over the past few days and bought a ticket now worth an estimated $590.5 million — the highest Powerball jackpot in history.
Saturday, May 18 2013 6:00 PM EDT2013-05-18 22:00:01 GMT
Witnesses in southwestern Virginia said a car drove into a crowd at a parade Saturday and hurt several people, but the nature of their injuries wasn't immediately known.
Witnesses in southwestern Virginia said a car drove into a crowd at a parade Saturday and hurt several people, but the nature of their injuries wasn't immediately known.
Lawmakers are ready to question the ousted head of the Internal Revenue Service as Congress holds its first hearing on the tougher scrutiny the IRS gave tea party and other conservative groups that applied for...
Senior Treasury officials were made aware in June 2012 that investigators were looking into complaints from tea party groups that they were being harassed by the Internal Revenue Service, a Treasury inspector general said...
Friday, May 17 2013 4:38 PM EDT2013-05-17 20:38:41 GMT
DOD photo
Defense Secretary Chuck Hagel on Friday ordered the military to recertify all 25,000 people involved in programs designed to prevent and respond to sexual assault.
Defense Secretary Chuck Hagel on Friday ordered the military to recertify all 25,000 people involved in programs designed to prevent and respond to sexual assault.
Friday, May 17 2013 4:17 PM EDT2013-05-17 20:17:46 GMT
A Humvee carrying six Navy SEALs and two other sailors overturned during a training exercise at Fort Knox in Kentucky, killing one of the SEALs and injuring the others, military officials said Friday.
A Humvee carrying six Navy SEALs and two other sailors overturned during a training exercise at Fort Knox in Kentucky, killing one of the SEALs and injuring the others, military officials said Friday.
Friday, May 17 2013 11:20 AM EDT2013-05-17 15:20:51 GMT
Remember when reading their diary or snooping through their drawers was good enough? Online and in real life, more and more parents are setting up elaborate surveillance systems.
Remember when reading their diary or snooping through their drawers was good enough? Online and in real life, more and more parents are setting up elaborate surveillance systems.
Friday, May 17 2013 11:04 AM EDT2013-05-17 15:04:49 GMT
(AP Photo/Charles Dharapak)
The Treasury Department's top investigator for tax matters is telling Congress that he is still investigating whether outside political pressure caused the Internal Revenue Service to improperly target conservative groups.
The Treasury Department's top investigator for tax matters is telling Congress that he is still investigating whether outside political pressure caused the Internal Revenue Service to improperly target conservative groups seeking tax-exempt status.
Friday, May 17 2013 6:46 AM EDT2013-05-17 10:46:58 GMT
The numbers sum up the frenzy that has taken over the Golden State since it joined the madness over Powerball, which has seen its jackpot soar to $550 million for Saturday's drawing.
The numbers sum up the frenzy that has taken over the Golden State since it joined the madness over Powerball, which has seen its jackpot soar to $550 million for Saturday's drawing.
Sunday, May 19 2013 10:57 PM EDT2013-05-20 02:57:40 GMT
The federal judge presiding over civil rights challenges to the stop-and-frisk practices of the New York Police Department has no doubt where she stands with the government.
The federal judge presiding over civil rights challenges to the stop-and-frisk practices of the New York Police Department has no doubt where she stands with the government.
Sunday, May 19 2013 10:25 PM EDT2013-05-20 02:25:40 GMT
Metro-North is urging commuters in Connecticut to make alternate plans starting on Monday. Train service on much of the New Haven line remains suspended after Friday's train derailment
Metro-North is urging commuters in Connecticut to make alternate plans starting on Monday. Train service on much of the New Haven line remains suspended after Friday's train derailment
Sunday, May 19 2013 9:21 PM EDT2013-05-20 01:21:50 GMT
The Connecticut Department of Transportation and Metro-North Railroad released the following information on Sunday regarding service on the New Haven commuter rail line
The Connecticut Department of Transportation and Metro-North Railroad released the following information on Sunday regarding service on the New Haven commuter rail line
Sunday, May 19 2013 8:35 PM EDT2013-05-20 00:35:12 GMT
A bicyclist was killed when he was struck by a livery cab in Brooklyn early Sunday morning. Police say the victim was riding eastbound on Eastern Parkway between Underhill and Washington Avenues
A bicyclist was killed when he was struck by a livery cab in Brooklyn early Sunday morning. Police say the victim was riding eastbound on Eastern Parkway between Underhill and Washington Avenues
Sunday, May 19 2013 8:05 PM EDT2013-05-20 00:05:54 GMT
Amtrak announced Sunday night that service remains suspended between New York and New Haven, with limited Amtrak service available between Boston and New Haven.
Amtrak announced Sunday night that service remains suspended between New York and New Haven, with limited Amtrak service available between Boston and New Haven.
Sunday, May 19 2013 7:26 PM EDT2013-05-19 23:26:29 GMT
The NYPD are looking for the suspect who shot and killed a 14-year-old girl on a Queens MTA bus Saturday night. The incident happened around 8:50 p.m. on Sutphin and Rockaway Boulevard
The NYPD are looking for the suspect who shot and killed a 14-year-old girl on a Queens MTA bus Saturday night. The incident happened around 8:50 p.m. on Sutphin and Rockaway Boulevard
Sunday, May 19 2013 6:42 PM EDT2013-05-19 22:42:18 GMT
U.S. Senator Kirsten Gillibrand (D-NY) announced a new legislation to reduce debt on federal loans. Gillibrand is proposing the "Federal Student Loan Refinancing Act"
U.S. Senator Kirsten Gillibrand (D-NY) announced a new legislation to reduce debt on federal loans. Gillibrand is proposing the "Federal Student Loan Refinancing Act"
Sunday, May 19 2013 3:14 PM EDT2013-05-19 19:14:07 GMT
Authorities say one person is dead and another was injured when the vehicle they were in ran off the road and crashed into Huntington harbor on Long Island Saturday evening.
Authorities say one person is dead and another was injured when the vehicle they were in ran off the road and crashed into Huntington harbor on Long Island Saturday evening.