Planet-hunting Kepler, asteroid orbiter Dawn out of fuel: NASA
NASA's planet-hunting Kepler space telescope and asteroid orbiter Dawn are about to run out of fuel, the US space agency has said. While Kepler has discovered over 2,500 confirmed exoplanets since its launch in 2009, Dawn was the first spacecraft to orbit a body between Mars and Jupiter. Dawn was also the first to orbit more than one celestial body. 