Assertion: nebula's gas | /r/HasProperty | hydrogen
Facets:
value: mostly
type: DEGREE
Source sentences:
text: The gas we are mainly referring to is Hydrogen, the most abundant element in the universe.
text: The collision was so violent that roughly a galaxy’s worth of gas (mostly hydrogen and helium) was expelled from both galaxies into intergalactic space, where it eventually settled into the ring structure seen to surround both galaxies today.
text: A nebula consisting of a rapidly expanding shell of glowing gas, mostly hydrogen, ejected from a red giant upon its collapse into a white dwarf.