Question

one day our earth will get finished by Sun how

Answer 1

Because of the heat of sun. The heat of sun is increasing by 10% every 100 years.

Answer 2

one day the earth will eventually be destroyed by the sun , because all medium sized stars convert into red gaints at the end of their life cycle,when all the hydrogen gets converted into helium.the sun will swell up and will destroy the earth because it will come much nearer to the earth,and burn the earth up.Including us.