After viewing the clip, invite pupils to find out as much as they can about the Moon images shown. When did this visit take place? The children could use a range of information sources to compile a report. They could also investigate the behaviour of shadows cast by the sun. Ask children to choose a shadow near to a window, or a shadow outdoors. The children could measure this shadow and perhaps chalk its outline. They could note the time of day and perhaps take a digital photograph. Encourage pupils to return to their shadows at 20 minute intervals and record any changes. When all the data is gathered ask the pupils to explain any changes they have noted in the shadows.