Do moons and plants produce light?
All objects reflect light but only Saturn and Jupiter produce it (albeit in the IR end of the Spectrum)
Not nessasarily. Moons can reflect light not produce it. When you see Moon light its actually sun light reflecting off of the moon.
There must be heat for infrared radiation. Technically, that is not light. Hot enough it does become visible at the edge of visible light. For a planet to do that, it is on the edge of being a star, albeit a dim brown dwarf at first. If Jupiter was three times its mass, it would be a dim star. As it is now, it is too small to generate the nuclear reactions with gravity. To produce visible light requires a chemical/intense heat(lamp) or thermodynamic nuclear reactions that create photons. Burning hydrogen (are helium} will do it like our sun does. So if you define light as only visible light, as most physics courses do, the answer is no, moons and planets only reflect the sun's light for us to see them.
