NASA's Space Telescope - Kepler, looking for planets outside the solar system, discovering in the dimming starlight caused by planets passing by their parent stars, relative to the point of view of Kepler. But there are other methods by which scientists can find a distant worlds that are similar to those which detects the telescope Kepler.
David Nesvorn of the Southwest Research Institute in Boulder, Colorado, and colleagues, working through the data sent by Kepler on Sun-like stars, defined as "Kepler Object of Interest 872," or simply - KOI-872, discovered something quite interesting - in a predetermined passage of the observed extrasolar planets have been late.
David Nesvorn of the Southwest Research Institute in Boulder, Colorado, and colleagues, working through the data sent by Kepler on Sun-like stars, defined as "Kepler Object of Interest 872," or simply - KOI-872, discovered something quite interesting - in a predetermined passage of the observed extrasolar planets have been late.
"This discovery showed great variation in time of passage of a planet around its star in excess of two hours' Nesvorn said in an interview with Discovery News. "At that time we were sure that there is something important in the solar system, what causes these changes."
It turns out the planet candidate, identified by Kepler team for the study, was in fact the two worlds the size of Saturn. One was held 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 previously used to detect the planet, says astrophysicist Norman Murray, University of Toronto. "Use of TTV, to detect unseen planets, although it was forecasted about seven years ago, but never led to actual discovery"?? Murray wrote 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» KOI-872, without a doubt, according to similar methods of detection.
Not so long ago, astronomers have found one more scientific method for the detection of hidden worlds.
"Radial velocity" - a method that searches for gravitational tug of planets orbiting in the optical spectrum of the star. The method as "transit", which uses a Kepler, planets finds that cross the surface of their parent stars, relative to the point of the telescope, thereby creating shaded areas on the background of stars.
0 Comments:
Speak up your mind
Tell us what you're thinking... !