Main.PhilMarshall 09 Oct 2011 Home Observing Introducing people to the night sky, and what they can see: by eye, with binoculars, with inexpensive telescopes, an...
Main.JoDunkley, Main.PhilMarshall 08 Oct 2011 The Life Cycle of Stars For a group of 10 30 people: uses balloons as models of 4 different types of stars, that ...