One similarity in the spectra of T dwarf stars and giant planets in our solar system is that their spectra show:
A) lots of free oxygen
B) lines of ionized magnesium and iron
C) indications of methane
D) nothing that shows that hydrogen was ever present in them
E) temperatures at which human beings could survive unprotected

Question

Quizplus · Accepted Answer

The presence of methane is a feature in the spectra of both T dwarf stars and giant planets in our solar system.

One Similarity in the Spectra of T Dwarf Stars and Giant