Title : 'Tatooine' gives first direct proof of 2-sun planet
link : 'Tatooine' gives first direct proof of 2-sun planet
'Tatooine' gives first direct proof of 2-sun planet
Dual output to double sunset the show continues, ever changing.Sometimes the orange sun rises first apparatus.Bubble times is red, although they are never far apart in the sky and you can see them moving around each other, casting double shadows across the firmament and periodically crossing right in front of the other.
Such is life, if possible, in the newest addition to the pantheon of strange planets now known to exist outside the bounds of our own solar system. Is the first planet, astronomers say, that has been definitely shown to be orbiting two stars at once, circling the pair - which in turn orbit each other tightly. - A distance of about 65 million miles
a team of astronomers using spacecraft planet-hunting Kepler NASA announced the discovery on Thursday in an article published in online in the journal Science, in a talk at a conference in Jackson Hole, Wyo., and in a press conference at NASA Ames Research Laboratory in Mountain View, Calif., headquarters Kepler.
the official name of the new planet is Kepler 16b, but astronomers are already referring to it informally as Tatooine, after the home planet of Luke and Anakin Skywalker in George Lucas "Star Wars" movies, which also had two suns.
"Reality has finally caught up with science fiction," said Alan P. Boss of the Carnegie Institution, a member of the research team.
Indeed, John Knoll, a visual effects supervisor at Industrial Light & Magic, which is part of Lucasfilm, and worked in several of the movies "Star Wars", joined the press conference Ames and showed a clip from the original film.
"again and again we see that science is stranger and stranger than fiction," Knoll said. "The very existence of this discovery gives us reason to bigger dream."
While some double-star systems, of which there are billions in the galaxy has been suspected to host planets have never seen those smaller bodies
"This is a direct detection, which removes all doubt." said Laurance Doyle of the SETI Institute in Mountain View, Calif. , who led the discovery team
beyond the wow factor, astronomers said the discovery -. as many discoveries of so-called exoplanets have done - had thrown a wrench to another theory well they received how they can and can not form planets. "In other words," said Sara Seager a planetary expert at the Institute of Technology of Massachusetts who was not part of the discovery team, "people do not really know how to form this planet."
it was long thought, Dr. Seager said, that its orbit is stable, a planet that belongs to two stars at once would have to be at least seven times as far from the stars as stars were each other. Accordingly, Kepler 16b would have to be twice as far as it is to survive.
"This planet the rule was broken," he said.
Moreover, timing of all eclipses and transits of the planet and stars in the system, astronomers have been able to measure the sizes and masses of the stars and the planet to unusually high precision, calibrating models of stellar and planetary properties.
"I think this is the planet measured best-outside the solar system," said Dr. Doyle.
Technically, Tatooine is probably a ball of rock and gas on the size and density of Saturn living in a system about 200 light years away in the constellation Cygnus.
If you go, wear layers package. Because those suns move back and forth all the time, temperatures on the planet can change by 50 degrees or more in the course of a few Earth days, from less than 100 to less than 150 degrees Fahrenheit. So the weather is like "a scathing day in Antarctica at best," as Dr. Doyle put it.
Kepler, launched in 2009, is on a mission to determine the fraction of stars in the galaxy have planets similar to Earth. a plot of about 155,000 stars in the constellations Cygnus and Lyra looking for dips in the stars when planets cross in front of their stars of origin under review.
In the case of Kepler system 16 - home to Tatooine - there turned out to be a lot of sauces. The two stars are about 20 million miles away and produce two eclipses every 41 days as they take turns to go ahead of the other. A star is about two-thirds of the mass of the Sun, the other around a fifth of the Sun
In addition, there are smaller gaps when the planet, which is about 65 million miles the central system - the distance of Venus from the Sun - passes in front of each of the stars in the course of its orbit 229 -day
.
the degree of dimming during the planetary transits - those times when a planet crosses the path of something else - usually allow Kepler astronomers to measure the size of a planet relative to the stars . As a result, the uncertainties in the properties of stars spread in the uncertainties of up to 25 percent of the mass of a planet -. Enough to blur the line between a rocky planet and a gaseous
But in the Kepler 16 system, by comparing slight variations in time of transits with calculations of the positions of the stars and the gravitational nudges agencies lend to each other, the team of Dr. Doyle could deduce the absolute and sizes of stars and planets in the system mass. This is a tool, they say, is becoming increasingly valuable for determining the masses of small planets in systems with multiple planets.
As a result, said Dr. Doyle "it is a laboratory for all kinds of physics and evolution of stars."
the Tatooine laboratory will be available to a wide audience for at least a while longer. Dr. Doyle noted that amateur astronomers in northern Asia, equipped with a telescope as little as eight inches and a C.C.D. off-the-shelf detector (an electronic device that uses cameras to capture images), would be able to record the passage of the planet Tatooine through the brightest star in its system on June 28 next year.
But enjoy it while you can. Due to variations in the orbital plane of the planet, as seen from Earth, the planet will stop crossing one of the stars as soon as 2014 and let transiting the other, brighter in 2018. He will be around 2042 before the show starts again for earthlings
Source:. new York Times
"'Tatooine' gives first direct proof of 2-sun planet", article source: riseearth.com
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