Why Are Protostars Difficult to Observe

question 11

Multiple Choice

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.

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Definitions:

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