Twee planeten dicht bij elkaar gezien

ATTENTION - EMBARGO - RELEASABLE JUNE 21, 2012 AT 1800 GMT(14:00 ET). THIS RESTRICTION APPLIES TO ALL MEDIA INCLUDING WEBSITES TO GO WITH AFP STORY US-SCIENCE-ASTRONOMY This image courtesy of Harvard-Smithsonian Center for Astrophysics shows an artist's conception, of a "hot Neptune" known as Kepler-36c as it looms in the sky of its neighbor, the rocky world Kepler-36b. The two planets have repeated close encounters, experiencing a conjunction every 97 days on average. An odd pair of distant worlds -- one rocky like Earth and another gassy like Neptune -- have been found doing the closest dance of any planetary pair ever discovered, US scientists said on June 21, 2012. The duo are orbiting their star about 1,200 light years from Earth, and were discovered with NASA's Kepler space telescope which launched in 2009 in search of Earth-like planets orbiting stars similar to our Sun. Their star is probably a lot like our Sun but several billion years older, and the planets are much closer to it, said the study in Science Express, the online edition of the journal Science. AFP PHOTO/HARVARD-SMITHSONIAN CENTER FOR ASTROPHYSICS/HANDOUT/RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT " AFP PHOTO / - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS AFP