A protostar is more like a stage previous to a star - before it ignites.
No, a protostar is basically the BEGINNING of a star's life cycle.
Protostar
A baby star is a newborn star. It is called "protostar."
A star that is forming is called a protostar.
The term is "protostar", not "prostar". Yes. A protostar is an early stage of a star.
protostar
Yes
No one. It comes from the Greek - proto - meaning first. So first star - a protostar.
trapping of thermal energy inside the protostar
If you can see it, its a star. Protostars radiate only in the infrared.
A star is called a protostar before it begins nuclear fusion in its core and officially becomes a star. During this stage, a protostar is formed from a collapsing cloud of gas and dust, as gravity pulls material together and heats up the core.
Protostar