Question

define a protostar plzz answer

Answer 1

Hello!!

1. A protostar is a baby star, an area of material that hasn't yet formed into a fully-fledged star.
1.1. A protostar is the stage in a star's life before it is hot enough to fuse hydrogen  

.....Protostars do not exhibit this characteristic, rather they are in a state of collapse until they are compressed to a point where pressure is high enough to have a temperature high enough to fuse Hydrogen......

....Protostars do fuse protons to Deuterium....

hope it helps