Nasa turns to robotic spacecraft to save telescope from falling back to Earth

Nasa is racing to save an ageing telescope from falling back to Earth with a daring rescue mission. The US$30 million salvage operation gets under way as soon as this week with the planned launch of a robotic lifesaver. Nasa hired start-up Katalyst Space Technologies to boost the Swift Observatory to a higher orbit where it can continue hunting for some of the universe’s biggest explosions. A thre