Assertion: nebula's material | /r/HasProperty | ionised
Facets:
value: compared to other regions
type: OTHER
Source sentences:
text: In many planetary nebulae, molecular emission is greatest at larger distances from the star, where more material is un-ionised, but molecular hydrogen emission in NGC 6543 seems to be bright at the inner edge of its outer halo.
text: Should it be read as that the material in these regions are less ionised compared to other regions; or that the concentration of ionised particles is lower, or something else?