Yesterday was an insane day - 4 hours of teaching, a meeting, a quick lunch and on a bus by 4pm to go on the 3rd year astrophysics group's field trip. Not really time for a main challenge pic but I did grab this wildcard entry while we stopped for dinner... Then it was on for 3 hours standing around freezing and looking through telescopes before getting back to the uni at gone midnight... (and I had to be in for a class at 8am today!).