A galaxy with almost no starlight but plenty of cool clouds of hydrogen gas would be best observed with a(n) _________ telescope.
A) X-ray
B) radio
C) infrared
D) optical (visible-light)

Question

Quizplus · Accepted Answer

Radio telescopes are ideal for observing cool clouds of hydrogen gas, as these clouds emit radio waves that can be detected even when there is little to no starlight.

A Galaxy with Almost No Starlight but Plenty of Cool