I'll never forget the moment Tim Peake blasted off into space. Exactly one month ago, I counted down with 3000 schoolchildren and watched nervously while the astronauts had to manually dock with the International Space Station.
Now, Tim is ready to go on a six-and-a-half-hour spacewalk to replace a voltage regulator - an electrical box controlling power from the station's solar panels. Even though spacewalks are fairly routine, I wonder how Tim is feeling. It must be scary to float out into space, but I think I'd be too excited to worry too much.