An introduction to the Sun and its role in our galaxy. The Sun is fundamental to our life on Earth. It is a huge ball of very hot gas. At its centre the temperature is 15 million degrees centigrade. A continuous reaction generates energy, some of which we receive as light and other forms of radiation. The Sun is part of a system of hundreds of billions of stars – a galaxy – called the Milky Way.

First broadcast:
12 October 2007

Students could use this clip to stimulate discussion on the Sun, and how it is useful to us. Ask students to consider the impact of life without the sun, and note that without it we would not be able to exist. Students could compile a list of questions they would like to ask about the sun. Working in pairs they could then research the answers to these questions to create a fact file on the sun.