1
QuizMultiple Choice

Universal Gravitation — Quiz

Question 1 • Earth and Space Science

Which statement best explains why eclipses can be predicted centuries in advance?

Answer
A
Gravitational forces between the Sun and Earth are the same as between the Sun and Moon.
B
The Moon's orbit slows gradually, which affects its future position.
C
The Sun's energy output follows a repeating cycle of emissions.
D
The orbital paths of celestial bodies are stable and can be precisely modeled.

Explanation

Eclipses happen when the Sun, Earth, and Moon line up in particular ways. Their orbital paths and motions are stable enough to calculate, so astronomers can model their future positions and predict when those alignments will occur. The Sun’s energy cycle and a gradual slowing of the Moon’s orbit do not explain eclipse predictions centuries ahead.

AI-written and checked against the verified answer.

Next