You can now go to Week 3: Looking closer
A report of an even bigger impact onto the Moon on 11 September 2013, seen by Spanish astronomers.
Do you have the skills to crater a planetary land mass to specific dimensions? Put your knowledge of meteorites and planetary surfaces to the test with this game. If you are an Open University student, make sure you are logged out of StudentHome and all other OU sites before using this link. There is a bug that prevents it working within the OU network.
To see more examples of lunar craters, watch this superb fly-over tour of the crater Tycho.