Go stargazing at the Royal Observatory
2pm daily throughout August, Peter Harrison Planetarium, Royal Observatory, Greenwich, SE10 (020 8858 4422, www. nmm.ac.uk) £6 adults, £4 children, £16 family ticket
Stargazing for Beginners is a breathtaking show that makes for an absorbing journey for under-fives through time and space in the beautifully refashioned planetarium. Also aimed at children is the 11am Secret of a Cardboard Rocket, while a full programme of shows, from Black Holes to the Sky Tonight Live, cater for older visitors. There are great galleries, too, where interactive displays make astrophysics easy-ish, and a glorious terrace café with rolling views over the park.