Assertion: nebula's star | /r/Synonym | protostar
Facets:
Source sentences:
text: Clumps of hydrogen will grow large enough to begin collapsing under their own weight, heating up and creating the early stage of a star called a Protostar.
text: Bipolar outflows are seen to occur both from very young stars ("protostars")
text: Hydrogen clumps together inside these clouds of gas growing ever larger and hotter until eventually the early stage of a star called a protostar is formed.
text: In a region of this dark cloud conditions allowed gravity to begin condensing the hydrogen until a substantial mass began to grow ever larger and hotter, eventually this mass collapsed in on itself, forming the early stage of a star called a protostar.