NASA’s planet-hunting Kepler telescope is broken, potentially jeopardizing the search for other worlds where life could exist outside our solar system.
If engineers can’t find a fix, the failure could mean an end to the $600 million mission’s search, although the space agency wasn’t ready to call it quits Wednesday. The telescope has discovered scores of planets but only two so far are the best candidates for habitable planets.
“I wouldn’t call Kepler down-and-out just yet,” said NASA sciences chief John Grunsfeld.
NASA said the spacecraft lost the second of four wheels that control its orientation in space. With only two working wheels left, it can’t point at stars with the same precision.
In orbit around the sun, 40 million miles from Earth, Kepler is too far away to send astronauts on a repair mission like the way Grunsfeld and others fixed a mirror on the Hubble Space Telescope. Over the next several weeks, engineers on the ground will try to restart Kepler’s broken wheel or find a workaround. The telescope could be used for other purposes even if it can no longer track down planets.
Kepler was launched in 2009 in search of Earth-like planets. So far, it has confirmed 132 planets and spotted more than 2,700 potential ones. Its mission was supposed to be over by now, but last year, NASA agreed to keep Kepler running through 2016 at a cost of about $20 million a year.