Question

question
select the correct answer.
what are stars in the early stage of their formation called?
prestars
protostars
main sequence
nebula

Explanation:

• Prestars: This is not a standard astronomical term for the early - stage of star formation.
• Protostars: A protostar is a very young star that is still gathering mass from its parent molecular cloud. It is in the early stage of star formation before it has reached the main - sequence stage.
• Main sequence: Stars in the main - sequence stage are in a stable phase of their lives where they are fusing hydrogen into helium in their cores. This is not the early stage of formation.
• Nebula: A nebula is a large cloud of dust and gas in space. While stars form from nebulae, a nebula itself is not the early - stage of a star's formation.

Answer:

protostars