ESA 's comet probe Rosetta wakes up , beams a signal back to Earth . The signals are sent at the speed of light and take about 10 minutes for them to reach us on earth. Scientist must now learn how to maneuver the craft around the environment of the comet . Rosetta is set to meet up with the comet in August , follow it for two years .
ESA 's comet probe Rosetta wakes up , beams a signal back to Earth . The spacecraft is nearly 500 million miles from the Sun , angling to rendezvous with a comet . Scientist must now learn how to maneuver the craft around the environment of the comet . Rosetta is set to meet up with the comet in August , follow it for two years .