The Sun is a star at the centre of our solar system that is orbited by eight planets. We need the sun’s energy and heat, without it there would be no life on earth. Stars do not have a solid surface, they are balls of gas. The suns gas is made up of 92% hydrogen and 8% helium. The sun is around 4.5 billion years old and has already burned off half of its hydrogen. The remaining hydrogen is enough to keep it burning for another 5 billion years but once this has burned out the sun will collapse into its core turning it into a cool white dwarf star.
» Located at the centre of our solar system the sun makes up around 99.8% of the mass of the solar system
» The temperature at the suns core is around 15 million degrees Celsius or 27 million degrees Fahrenheit
» The rotation of the sun is opposite to that of the earth. The sun goes west to east instead of east to west. It takes between 25 and 36 days to do a full rotation.
» One million earths could fit inside the sun
» The suns gravity pulls planets towards it but as the planets try to fly away they become trapped half way resulting in them orbiting the sun
» The energy from the sun is produced by nuclear fusion, using hydrogen as its fuel. The output of this is about 380 billion megawatts
» The sun surface has sun spots which are dark areas caused by the temperature being a lot lower than that of the surrounding areas. Near the sun spot you can get solar flares, these are sudden bursts of light.
» The sun is 150 million kilometres (93 million miles) from earth
» The sun is currently classed as a yellow dwarf star
» A total solar eclipse happens when the moon is directly between the earth and the sun this causes a shadow on the earth
» The Greeks called the sun Helios and the Romans called it Sol