Einstein's most famous equation is E = mc², which describes the rest mass energy inherent to particles. But motion matters for energy, too.
Some say that the Sun is a green-yellow color, but our human eyes see it as white, or yellow-to-red during sunset. What color is it really?
Across all wavelengths of light, the Sun is brighter than the Moon. Until we went to the highest energies, and saw a gamma-ray surprise.
Einstein's most famous equation is E = mc², which describes the rest mass energy inherent to particles. But motion matters for energy, too.