Question

what does einsteins famous equation say that all matter is? concentrated supernovas that have condensed into dwarfs concentrated energy that has condensed into the atoms concentrated atoms that have condensed into protons concentrated nebulas that have been condensed into red giants

Explanation:

Einstein's famous equation $E = mc^{2}$ shows that matter and energy are equivalent. Matter is concentrated energy. This equation implies that a small amount of mass can be converted into a large amount of energy. So matter can be thought of as concentrated energy that has condensed into atoms.

Answer:

concentrated energy that has condensed into the atoms