Post by auntym on Oct 16, 2012 10:55:22 GMT -6
www.huffingtonpost.com/2012/10/15/tatooine-planet-ph1-suns-star-astronomers_n_1967273.html
'Tatooine' Planet PH1, With Two Suns In Four-Star System, Found By Amateur Astronomers
Posted: 10/15/2012
By: Jeanna Bryner
Published: 10/15/2012 on SPACE.com
Amateur astronomers have helped discover an alien planet with two suns and a twinkling twist: The entire twin-sun setup, a real-life version of Tatooine from "Star Wars," is orbited by two more stars — a solar system that is the first of its kind known.
The alien planet, called PH1, is a gas giant planet slightly bigger than Neptune. Its discovery in the midst of a strange, four-star planetary system is the first confirmed world discovered as part of the Yale University-led Planet Hunters project, in which armchair astronomers work with professional scientists to find evidence of new worlds in the bountiful data collected by NASA's Kepler space telescope.
In this family portrait of the PH1 planetary system, the newly discovered planet is depicted in this artist's rendition transiting the larger of the two eclipsing stars it orbits. Off in the distance, well beyond the planet orbit, resides a second pair of stars bound to the planetary system.
"Planet Hunters is a symbiotic project, pairing the discovery power of the people with follow-up by a team of astronomers," said Debra Fischer, a professor of astronomy at Yale and planet expert who helped launch Planet Hunters in 2010, in a statement. "This unique system might have been entirely missed if not for the sharp eyes of the public."
Since its March 2009 launch, Kepler has found evidence of more than 2,300 candidate alien worlds. [Gallery: More Alien Planets with Twin Suns]
Finding a strange, new world
Since its initial discovery via Planet Hunters, the existence of PH1 has been confirmed by a team of professional astronomers, who will present their work today (Oct. 15) at the annual meeting of the Division for Planetary Sciences of the American Astronomical Society in Reno, Nev.
With a radius about 6.2 times that of Earth's, PH1 is a smidge bigger than Neptune. The gassy planet spends 138 days completing a single orbit around its two parent stars, which have masses about 1.5 and 0.41 times that of the sun. The stars circle each other once every 20 days.
The two other stars orbiting the PH1's twin suns are about 1,000 astronomical units (AU) from the parent stars. (One AU is about the distance between the Earth and sun, about 93 million miles or 150 million kilometers.)
If you're hoping to catch the quadruple sunset, this may not be your best bet. The researchers estimate PH1's temperature would range from a minimum of about 484 degrees Fahrenheit (524 Kelvin, or 251 degrees Celsius) and a maximum of 644 degrees F (613 Kelvin, or 340 degrees C), too hot to be in the habitable zone.
"Although PH1 is a gas giant planet, even if there is a possibility of rocky moons orbiting the body, their surfaces would be too hot for liquid water to exist," researcher Meg Schwamb of Yale University and colleagues write in a draft of their research article.
CONTINUE READING: www.huffingtonpost.com/2012/10/15/tatooine-planet-ph1-suns-star-astronomers_n_1967273.html
'Tatooine' Planet PH1, With Two Suns In Four-Star System, Found By Amateur Astronomers
Posted: 10/15/2012
By: Jeanna Bryner
Published: 10/15/2012 on SPACE.com
Amateur astronomers have helped discover an alien planet with two suns and a twinkling twist: The entire twin-sun setup, a real-life version of Tatooine from "Star Wars," is orbited by two more stars — a solar system that is the first of its kind known.
The alien planet, called PH1, is a gas giant planet slightly bigger than Neptune. Its discovery in the midst of a strange, four-star planetary system is the first confirmed world discovered as part of the Yale University-led Planet Hunters project, in which armchair astronomers work with professional scientists to find evidence of new worlds in the bountiful data collected by NASA's Kepler space telescope.
In this family portrait of the PH1 planetary system, the newly discovered planet is depicted in this artist's rendition transiting the larger of the two eclipsing stars it orbits. Off in the distance, well beyond the planet orbit, resides a second pair of stars bound to the planetary system.
"Planet Hunters is a symbiotic project, pairing the discovery power of the people with follow-up by a team of astronomers," said Debra Fischer, a professor of astronomy at Yale and planet expert who helped launch Planet Hunters in 2010, in a statement. "This unique system might have been entirely missed if not for the sharp eyes of the public."
Since its March 2009 launch, Kepler has found evidence of more than 2,300 candidate alien worlds. [Gallery: More Alien Planets with Twin Suns]
Finding a strange, new world
Since its initial discovery via Planet Hunters, the existence of PH1 has been confirmed by a team of professional astronomers, who will present their work today (Oct. 15) at the annual meeting of the Division for Planetary Sciences of the American Astronomical Society in Reno, Nev.
With a radius about 6.2 times that of Earth's, PH1 is a smidge bigger than Neptune. The gassy planet spends 138 days completing a single orbit around its two parent stars, which have masses about 1.5 and 0.41 times that of the sun. The stars circle each other once every 20 days.
The two other stars orbiting the PH1's twin suns are about 1,000 astronomical units (AU) from the parent stars. (One AU is about the distance between the Earth and sun, about 93 million miles or 150 million kilometers.)
If you're hoping to catch the quadruple sunset, this may not be your best bet. The researchers estimate PH1's temperature would range from a minimum of about 484 degrees Fahrenheit (524 Kelvin, or 251 degrees Celsius) and a maximum of 644 degrees F (613 Kelvin, or 340 degrees C), too hot to be in the habitable zone.
"Although PH1 is a gas giant planet, even if there is a possibility of rocky moons orbiting the body, their surfaces would be too hot for liquid water to exist," researcher Meg Schwamb of Yale University and colleagues write in a draft of their research article.
CONTINUE READING: www.huffingtonpost.com/2012/10/15/tatooine-planet-ph1-suns-star-astronomers_n_1967273.html