Assertion: nebula's hydrogen | /r/HasProperty | neutral
Facets:
value: mainly
type: DEGREE
Source sentences:
text: If the hydrogen is mainly neutral, no radiation with energy above this threshold can penetrate except for photons with energies in the X-ray range and above (thousands of electron volts or more), in which case the hydrogen becomes somewhat transparent.
text: In the outer parts of the dark cloud, hydrogen is neutral.
text: In the outer parts of the dark cloud, the hydrogen is neutral.