Exponents add when you multiply: A million is 10^6, so a million, times a million, times a million, times a million, times a million = 10^30.<br />Our sun will become a white dwarf in 40 billion years, probably sooner: Mainstream opinion is about 4 billion years. It will be about the size of Earth, very high density, so it will cool very slowly. It will have very high surface gravity, but possibly (after it cools many trillions of years) there will be a thin film of ordinay matter = mostly metalic liquid hydrogen and helium gas on the surface. The pressure will be very high due to the extreme gravity. Neil