What are the two types of electromagnetic radiation emited by stars and galaxies ?
Light and light. Stars and black holes also release particles of matter, but that’s not to be confused with electromagnetic radiation (light). When our sun burps up a solar flare, it flings matter into space in the form of plasma. When stars go supernova, they send a very large portion of their matter into space. Black holes are known to emit strong rays of plasma from their poles as they consume matter as well. As far as electromagnetic radiation is concerned there is only one, but can originate from a variety of sources. I’m guessing you’re referring to nuclear radiation in the form of high energy gamma rays and thermal radiation caused by heating matter to high temperatures, but it’s light all the same.
