The centre of the Sun is its core which produces all the Sun’s energy.

The Sun is the biggest object in the Solar System and makes up 99% of its mass. Its diameter is around 109 times bigger than Earth, but you could fit over A MILLION Earths inside the Sun.

Astronomers think that the Sun (and the planets) formed from the solar nebula about 4.59 billion years ago, so it's pretty old!

Its temperature is 5,500 degrees

Celsius on the surface and a

whopping 15.6 million degrees

Celsius at the core. The temperature

of the sun isn't the same all over;

in some places 'sun spots' occur

where it isn't as hot as elsewhere.

We see it as a large round red ball only because we are much closer to the Sun than to any of the other stars. Other stars may be larger, brighter, smaller or fainter than our Sun but they are so very far away that we only see them as points of light in the night sky.

The sun is made almost entirely of hydrogen, with a little helium and a few heavier gases including oxygen - and there's even some iron in there too. Light from the Sun reaches the Earth in just 8 minutes!

The temperature inside the Sun can reach 15 million degrees Celsius:At the Sun’s core, energy is generated by nuclear fusion, as Hydrogen converts to Helium. Because hot objects generally expand, the Sun would explode like a giant bomb if it weren’t for its enormous gravitational force.The Sun generates solar wind:This is a stream of charged particles, which travels through the Solar System at approximately 450 kilometres per second. Solar wind occurs where the magnetic field of the Sun extends into space instead of following its surface.