Assertion: reflection nebula | /r/HasAspect | continuous spectrum
Facets:
value: with weak absorption lines
type: OTHER
Source sentences:
text: They are divided into emission nebulas, whose spectra consist primarily of emission lines; reflection nebulas, which have a continuous spectrum with weak absorption lines; and dark nebulas, which are dense, nonluminous clouds of gas and dust that absorb the radiation of the bright background of the sky.