Luminous
A lamp or a flame radiate light. (as do incandescent bodies) A radiator radiates heat, (as does any other hot body) And speakers or horns radiate sound ( as do any vibrating bodies)
They are stars that, like our Sun, radiate light. Then there are planets, like Saturn, Mars, Jupiter, etc, that reflects light shinning on them from our Sun.
Luminescence.
Here points radiate out from the central idea or concept.
Light, whatever the wavelength, does not need a medium in order to radiate.
The wide range of energy waves that radiate from the sun is called the electromagnetic spectrum. This spectrum includes various types of radiation, such as visible light, ultraviolet light, infrared radiation, and more. Each type of wave has different wavelengths and energies, contributing to the sun's overall energy output and its effects on Earth.
Earth does radiate light in the form of thermal radiation, which is emitted as heat energy. This radiation is typically in the infrared range and is a result of the Earth's surface absorbing sunlight and then re-emitting it as heat.
Objects that can radiate energy include stars, light bulbs, heated coils, and the Earth's surface. The type of radiation (such as heat, light, or electromagnetic waves) emitted by an object depends on its temperature and composition.
Black color absorbs more heat because it absorbs all wavelengths of light, rather than reflecting some like other colors. This absorption leads to an increase in the internal energy of the object, which is perceived as heat. Black bodies also radiate heat more efficiently due to their high absorbance, making them appear to be better at emitting heat compared to lighter colors.
Aurora borealis; the Northern Lights.
No, all the stars radiate light equally in all directions.
The sun radiates light and heat energy.