Assertion: quasar's spectra | /r/MadeOf | spiky area
Facets:
Source sentences:
text: More recent quasars show no absorption region, but rather their spectra contain a spiky area known as the Lyman-alpha forest; this indicates that the intergalactic medium has undergone reionization into plasma, and that neutral gas exists only in small clouds.
text: their spectra contain a spiky area known as the Lyman-alpha forest.
text: their spectra contain a spiky area known as the Lyman-alpha forest.