Part of the show Sun Tans, Fission and Fusion
Charles in Hawaii asked:
Does the Sun move and what impact could the movement of the Sun and changes in velocity have on things like other planets?
The Sun does move. We're orbiting our galaxy; we're on one of the spiral arms of the galaxy. We go round about every 240 million years so our whole solar system is moving. But relative to our solar system it sits at the centre of the solar system and is so massive that it controls the movement of the planets. It sets the orbits of the planets.