Astrophysical Revolutions

I've recently taken up a couple of hours a week of physics tutoring. It has overall been really enjoyable and a great opportunity to brush off the mental cobwebs covering 4 years worth of university education. Unfortunately some bits seem to be completely missing, particularly anything relating to electronics. I don't know which is worse, the bits that I can't remember at all or the bits where the answer takes me so long to get to that I'm glad you can't lose degrees.

Like I said though it has been a generally enjoyable experience and it has reminded me of why I love physics and why I also enjoy teaching (where it's with people who want to learn). I've also learnt a few new things while I've been doing it, and discovered that the European Space Agency have made a revolutionary breakthrough in environmentally friendly telescope design... Genius really.