The best way to use a telescope to look for life on other planets is to
A) search for absorption from nitrogen in their atmospheres.
B) search for absorption from oxygen in their atmospheres.
C) search for emission lines from water vapor in their atmospheres.
D) search for carbon dioxide on their moons.
E) look for artificial satellites.

Question

Quizplus · Accepted Answer

Oxygen is a strong indicator of potential life because it is often produced by biological processes, such as photosynthesis, and is not typically found in large quantities in atmospheres without life.

The Best Way to Use a Telescope to Look for Life