ESA Hubble Science Release | 2016 Sep 22
Hubble Finds Planet Orbiting Pair of Stars
NASA | STScI | HubbleSite | 2016 Sep 22
Two's company, but three might not always be a crowd — at least in space.
[img3="Artist's View of Planet Orbiting Twin StarsAstronomers using NASA's Hubble Space Telescope, and a trick of nature, have confirmed the existence of a planet orbiting two stars in the system OGLE-2007-BLG-349, located 8,000 light-years away towards the center of our galaxy.
Credit: NASA, ESA, and G. Bacon (STScI)"]http://imgsrc.hubblesite.org/hu/db/imag ... ge_web.jpg[/img3][hr][/hr]
The planet orbits roughly 300 million miles from the stellar duo, about the distance from the asteroid belt to our sun. It completes an orbit around both stars roughly every seven years. The two red dwarf stars are a mere 7 million miles apart, or 14 times the diameter of the moon's orbit around Earth.
The Hubble observations represent the first time such a three-body system has been confirmed using the gravitational microlensing technique. Gravitational microlensing occurs when the gravity of a foreground star bends and amplifies the light of a background star that momentarily aligns with it. The particular character of the light magnification can reveal clues to the nature of the foreground star and any associated planets. ...
The First Circumbinary Planet Found by Microlensing: OGLE-2007-BLG-349L(AB)b - D.P. Bennett et al