Radio telescopes are important in astronomy because
A) they can detect cool hydrogen.
B) they have high magnification.
C) the can detect interstellar dust clouds.
D) they are very inexpensive to build on tops of mountains.
E) they don't need to be as large as optical telescopes to achieve the same resolving power.

Question

Quizplus · Accepted Answer

Radio telescopes can detect cool hydrogen, which emits radio waves, allowing astronomers to study regions of space that are not visible in optical wavelengths.

Radio Telescopes Are Important in Astronomy Because