The existence of gravity waves is predicted by Einstein's Theory of General Relativity. Their existence has not yet been confirmed. Sources include the sun, our galaxy, and other galaxies. Nuclear radiation are the energetic particles and energetic electromagnetic waves released during the radioactive decay of unstable isotopes. It is generally considered dangerous and, as we shall see, it largely deserves this reputation.
Nuclear radiation comes in several forms.
Some items should not be added to this list of dangerous forms of radiation. Two examples are provided below. Neutrinos These weakly interacting, possibly even massless particles may have their origin in nuclear reactions, but they certainly pose no threat to humans or other living things on earth. Trillions or more pass though us every second with absolutely no effect. Yes, microwaves are a form of radiation, but then so are infrared and light.