Sun

The Sun is the star at the centre of the Solar System. It is a huge ball of hot gas that provides the light and heat that make life on Earth possible.

Structure

The Sun is made mostly of hydrogen and helium. In its core, nuclear fusion converts hydrogen into helium, releasing enormous energy.

Importance

Sunlight drives Earth's climate, weather and photosynthesis. The Sun is about 4.6 billion years old and roughly halfway through its life.

Frequently asked questions

What is the Sun?

The star at the centre of the Solar System.

What is the Sun made of?

Mostly hydrogen and helium gas.