I have some questions about the universe, am not sure whether they are closer to physics or astronomy..anyway here goes 1. They say that we are moving away from the sun! but how and where are we getting the energy for that? My speculation is that the sun is creating energy from mass thus its getting lighter, thus its gravitational pull on earth is loosening.... 2. The universe is expanding, according to modern theory..and again is that the energy from the big bang thats still taking effect till now? 3. Where does the earth gets the energy to rotate around the sun and about itself? is it a kind of regenerative energy, or again its the energy still left since the formation of the earth?