If you can see it, its a star.
Protostars radiate only in the infrared.
A protostar. See related question.
A rotating nebula (a cloud of gas and dust) collapses under gravity. This creates a lot of heat energy. A "protostar" forms, before nuclear fusion begins. When the core temperature is high enough, hydrogen nuclei can undergo fusion and become helium, releasing nuclear energy. So, eventually the protostar becomes a "true" star and reaches the Main Sequence on the HR diagram. The newly forming star has its greatest luminosity during the earlyprotostar stage. (The protostar has a much bigger surface area than the final star.)
Before a star is born, it exists as a dense region within a molecular cloud, primarily composed of gas and dust. This region, known as a protostar, undergoes gravitational collapse, causing the material to clump together and heat up. As the temperature and pressure increase in the core, nuclear fusion begins, marking the transition from a protostar to a main-sequence star. Thus, a star's life begins with the intricate processes of formation and transformation within stellar nurseries.
Wiktionary: "Prototypical; preceding the proper beginning of something". That sounds about right, for a protostar.
do you mean star, or act? if you meant star, no. i dont know the answer if you meant act.
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.
A star that is forming is called a protostar.
A baby star is a newborn star. It is called "protostar."
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
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