Right :-) The sun is also made of Helium and Hydrogen .. If all hydrogen is used up, Our Sun would turn into a Red Giant.. The last stage of all stars. :-)
Five or so billion years from now, Earth's present orbit won't be a good place to be as the Sun swells dramatically before dying to its white dwarf stage. Best hope: Whoever is living here then is smart enough to move themselves...or move the Earth.