Assertion: nebula's star | /r/AtLocation | age
Facets:
Source sentences:
text: When a star like our Sun comes to age, having longly burned away all the hydrogen to helium in its core in its main sequence phase, and in a later evolutionary state following the red giant stadium (the "Horizontal Branch" state, for their places in the Color-Magnitude Diagram (CMD) or Hertzsprung-Russell Diagram (HRD)), also the helium to carbon and oxygen