Which of the following did NOT require the use of a telescope to observe?
A) Spots on the Sun
B) Retrograde motion of the planets
C) Phases of Venus
D) Jupiter's moons

Name: Which of the following did NOT require the use of a telescope to observe? A) Spots on the Sun B) Retrograde motion of the planets C) Phases of Venus D) Jupiter's moons
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Question

Quizplus · Accepted Answer

Retrograde motion of the planets is visible to the naked eye, as it is an apparent change in the direction of movement of planets in the sky.

Which of the Following Did NOT Require the Use of a Telescope