The new technique, using NASA's Spitzer Space Telescope, allows astronomers to probe the temperatures, atmospheres and emissions of planets, Charbonneau told SPACE.com. It might even let them measure wind for the first time on a planet around another star.
TrES-1 and its star are about 500 light-years from Earth.
The other planet, named HD 209458b, is slightly lass massive than Jupiter and a bit larger. It is about 150 light-years from Earth. These observations were led by Drake Deming of NASA's Goddard Space Flight Center.