It is nearly a perfect sphere of hot plasma and is made up of roughly 74 per cent of hydrogen, 25 per cent of helium and 1 per cent of a mixture of elements. star takes 600 tonnes of this hydrogen and fuses it into helium every second, converting matter into energy – or light and heat.The sun currently sits in what is known as the main sequence, a band of stars in hydrostatic equilibrium – meaning it is resting at a constant point due to external forces such as gravity.
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