A MISSION to find nearby alien planets to search for signs of life is a step closer to lift-off.
While NASA鈥檚 Kepler space telescope is already looking for Earth-sized planets (麻豆传媒, 7 February 2009, p 8), most of the worlds it finds will be too distant for their spectra to be scanned for oxygen or other hints of life.
The proposed space telescope, called , would use the same method as Kepler and watch for the brief dimming as a planet passes in front of its star. But PLATO would focus on systems close enough to scan for bio-signatures. 鈥淧LATO potentially will get us targets,鈥� says Jonathan Lunine of the University of Arizona in Tucson.
Advertisement
鈥淭he PLATO space telescope would look for star systems close enough to scan for bio-signatures鈥�
The European Space Agency announced last week that PLATO is now vying for two launch slots from the agency. Its competitors are , a space telescope that would measure dark energy and dark matter, and , which would observe the sun from an orbit approaching closer than Mercury鈥檚. The winners could fly as early as 2017.
