How did the discovery of Neptune differ from the discoveries of Uranus and Pluto?
A)Neptune's presence was first predicted using Newton's gravitational law to interpret deviations in the motion of another planet, whereas Uranus and Pluto were discovered during sky searches.
B)Neptune was discovered by accident by an amateur astronomer, whereas Uranus and Pluto were both found by professional astronomers doing specific searches for a new planet.
C)Neptune was found during a survey of the sky, whereas Uranus and Pluto were found after being predicted on the basis of their gravitational influence on the motions of neighboring planets, Saturn and Neptune, respectively.
D)Neptune was discovered by photographic surveys of the sky, whereas Uranus and Pluto were found by visual searches.

Question

Quizplus · Accepted Answer

The discovery of Neptune differed from the discoveries of Uranus and Pluto in that Neptune's presence was first predicted using Newton's gravitational law to interpret deviations in the motion of another planet, whereas Uranus and Pluto were discovered during sky searches.

How Did the Discovery of Neptune Differ from the Discoveries