Protostars are difficult to observe because ___________. a. they are surrounded by cocoons of gas and dust. b. they radiate main
ly in the ultraviolet part of the spectrum. c. they are too far away to be observed from the Earth the protostar stage is way too short (less than 1 year)
First of all, this isn't Geography. Second of all, look around Brainly for the answer before you post a question, because it has been answered over 10 times now...
