Why did the Universe start off with Hydrogen, Helium, and not much else?

“I see a lot of new faces. But, you know the old saying, ‘out with the old, in with the nucleus.’” –The Simpsons Looking around the Universe today, there’s no doubt that there’s plenty of hydrogen and helium around; after all, it’s the nuclear fusion of hydrogen into helium that powers the vast majority of stars … Read moreWhy did the Universe start off with Hydrogen, Helium, and not much else?

What is the Sun made out of?

“The sun is a mass of incandescent gas A gigantic nuclear furnace Where hydrogen is built into helium At a temperature of millions of degrees” –They Might Be Giants It’s so ingrained in us that the Sun is a nuclear furnace powered by hydrogen atoms fusing into heavier elements that it’s difficult to remember that, … Read moreWhat is the Sun made out of?