NASA’s Hubble Space Telescope - Kepler, looking for extrasolar planets system, detecting dimming starlight caused by planets passing by their parent stars, relative to the point of view of Kepler. But there are other ways in which scientists can find distant worlds, similar to those which detects telescope Kepler.
David Nesvorny, of the Southwest Research Institute in Boulder, Colorado, and his colleagues, working through the data sent by Kepler Sun-like star, described as "Kepler Object of Interest 872" or simply - KOI-872, discovered something quite interesting - with the settlement of the observed exoplanets pass was late.
"This discovery showed a huge change in time of passage of a planet around its star exceeds two hours," Nesvorny said in an interview with Discovery News. "At that time, we were sure that there is something important in the solar system, causing such changes."
It turns out the planet candidate, Kepler team identified for the study, was in fact the two worlds the size of a Saturn. One took place in orbit in the detection telescope Kepler, second world, at the same time, was hidden from the "eye" of scientists.
Changes in travel time along the orbit, or TTV, never been used previously to detect planets, notes astrophysicist Norman Murray, from the University of Toronto. "The use of TTV, to detect unseen planets, although it was predictable about seven years ago, but never led to actual detection," Murray writes in the online edition of the scientific journal Science on Thursday.
Another "invisible world" called Kepler-19c was detected by its gravitational interaction with ekzoplanetarnym brother in 2011. Thus, the opening of the new "invisible world