Why are protostars difficult to observe?
A)The protostar stage is very long.
B)They are all so far away that the light hasn't reached us yet.
C)Most of their radiation is in the form of X-rays.
D)They are surrounded by cocoons of gas and dust.

Question

Quizplus · Accepted Answer

Protostars are difficult to observe because they are surrounded by thick cocoons of gas and dust. This makes it hard for their radiation to escape and reach us, so they are only detectable by their infrared emissions.

Why Are Protostars Difficult to Observe