Everything around us - you, me, trees, buildings, the Earth - is made of stuff formed inside stars. Like us, stars are born, live and die. When they die the elements formed inside them are released into space. Here they go on, to form more stars, more planets and perhaps more trees and people. Every star shares the same basic story. Particles in a giant cloud of gas in space clump together into a big mass, the centre gets hot and tightly packed so that the atoms start crashing into each other more frequently. Nuclear fusion occurs and the star starts to shine.
Twinkling sounds.The Milky Way is filled with clouds of gas many light years across, in which gas is drawing together and stars are being born all the time.