Isaac Newton never believed that light was in waves. Newton believed that light is corpuscular, or in little bodies.
Stars could be "light." The color of a star could be its color of light. So a large blue star is "blue" light; and a small red star is a "red" light.
Blue stars are larger than red stars, and blue light has more energy than red light. The mass of a star could correspond to the energy of photons on the electromagnetic spectrum. Following that reasoning, radiation with less energy than light--i.e. microwave and radio--would correspond to celestial bodies with less mass than stars, or planets and comets. Radiation with more energy--i.e. ultraviolet and X-rays--would be very large stars, or globular clusters.
Globular clusters ("GC's") are giant concentrations of stars that are found in a "halo" around most large galaxies. In each globular cluster, almost all of the (thousands of) stars are the same color. Globular clusters are probably formed around where the galaxy produces stars. If this theory is correct, then stars in a globular cluster should be (slowly) "radiating" away, like light radiates from an atom.
Stable atoms rarely emit X-rays, so globular clusters should rarely be found outside of a galaxy. By studying the distribution of globular clusters in a galaxy, we can learn more about how the galaxy produces stars.
The largest concentration of stars in any galaxy is in its center. Stars are thought to be "eaten" by the center of the galaxy. The galaxy probably absorbs stars at its center, like an atom absorbs light.
