(Because it’s also the International Year of Astronomy, over the next few weeks, we are happy to present a few reprinted funny pieces that relate to this business of space – Enjoy!) Are you doomed? There’s only one way to find out, and that’s to consult a colour-coded chart. Take, for example, the Torino Scale, which astronomers use to express the likelihood of an asteroid hitting the Earth. Asteroid impacts are believed to be responsible for several mass extinctions – just ask the dinosaurs (oh wait, you can’t) – and it’s only a matter of time until another killer rock…