How is it possible to observe dark nebulae?
A) They emit radiation only in the infrared.
B) Their gravity affects the motion of nearby stars.
C) They block light from more distant stars.
D) They are sometimes illuminated by nearby bright stars.

Question

Quizplus · Accepted Answer

Dark nebulae are observed because they block the light from more distant stars, creating a silhouette effect against the brighter background.

How Is It Possible to Observe Dark Nebulae