If heat can radiate into empty space, a vacuumed metal container can be a heat sink. The space around us is 99.9% vacuum space, how can air is not getting colder? All scientists are wrong about radiation. Radiation is not light/photon/EM waves/radiant energy emitting from matters into space around. Radiation is the line of sight matter and matter sharing their surface atoms' oscillating electrostatic force through universal repulsion force. The sun and earth and moon do not radiate heat or light into space. All forms of energy must coexist with matter/carrier. Sunlight has never left earth atmosphere, sunlight moves around the earth constantly, energy moves around the earth's surface constantly, powers everything forever. The sun never dies, scientists lied. The sun is not a fusion reactor. The sun is a heat sink that keeps the earth temperature stable. Gravity holds matter, matter holds energy, bigger mass holds denser energy therefore has a higher temperature. Solar cells produce electricity from sunlight, but the mechanism is not a photoelectric effect. There is no such thing as photon/quanta/quantum. Sunlight is an induced AC current in the sun-facing atmosphere. This AC current can energize free electrons to move over the contact area of two different materials/semiconductors, therefore produce current. The voltage of the AC must greater than the difference between the two materials' atom bounding potential. The universe is self-existing and immortal existing, we are the witness.