Clear vision

The US has decided to risk a mission to fix the Hubble space telescope. And it is not without risk … a great deal of risk. You'd have to be really pleased to be one of the astronauts chosen - although it seems they have done it before and are being re-formed for the mission. So what's the risk? If something goes wrong with the Shuttle, they are too far away from the Space Station to take refuge there. So, to minimise the risks, there will be a second Shuttle on standby to mount a rescue mission if required. I hadn't realised that the Hubble is actually in orbit and will one day come crashing back to Earth.