Scientists have figured out when the sun will be at its hottest.

The European Space Agency has studied data on thousands of sun-like stars in the Milky Way and figured out how its future will turn out. The Sun is now 4.57 billion years old and continues to heat up. The hottest star will be 8 billion years old. Then it will cool down, increase in size and become a red giant in 10-11 billion years. Then, in about 11.8 billion years, it will gradually turn into a white dwarf - that is, into stellar remnants.