By 1891 only about 300 asteroids had been discovered. After 1891 hundreds more were discovered quickly. What caused this increased discovery rate for asteroids?
A) invention of the telescope
B) invention of photography
C) advent of astrophotography
D) heightened interest in the solar system fueled by Percival Lowell and the Martian canals controversy

Question

Quizplus · Accepted Answer

The advent of astrophotography allowed astronomers to take photographs of the night sky and analyze them later to identify moving objects, such as asteroids, which significantly increased the rate of asteroid discovery.

By 1891 Only About 300 Asteroids Had Been Discovered