Last night it was very cold and clear here, near Cambridge UK. I looked up and saw the star Betelgeux, in Orion, and every time I see this star I remember seeing a TV programme long ago - maybe 'The Sky at Night' - where we were told Betelgeux is red giant and if you at even with the naked eye you can see it is red. We all ran outside to look and yes! It is visibly red. So next time you see the stars during winter months look for Orion - a bit like a giant letter H and see Betelgeux, the one at top left, is red.