On what basis did Herschel think he had found a comet?
A)The object appeared as a small greenish disk in his telescope.
B)It appeared to be moving slightly night by night.
C)No star appeared in that position on his charts.
D)It was not a point of light, like a star should appear.
E)All of the above are correct.

Question

Quizplus · Accepted Answer

Herschel thought he had found a comet based on all of the above reasons. The object appeared as a small greenish disk in his telescope, it appeared to be moving slightly night by night, no star appeared in that position on his charts, and it was not a point of light like a star should appear. Typically, comets appear as fuzzy patches rather than point-like stars. Herschel thought he had found a comet based on all of the above reasons. The object appeared as a small greenish disk in his telescope, it appeared to be moving slightly night by night, and no star appeared in that position on his charts. Additionally, it was not a point of light, like a star should appear.

On What Basis Did Herschel Think He Had Found a Comet