Question

1. eccentricity measures: a) how much an orbit tilts b) how elongated an orbit is compared to a circle c) the speed of rotation d) the size of the orbit

Explanation:

To determine the correct answer, we analyze each option:

• Option A: The tilt of an orbit is related to inclination, not eccentricity.
• Option B: Eccentricity in orbital mechanics is defined as a measure of how elongated (or "stretched out") an orbit is compared to a perfect circle (where eccentricity is 0).
• Option C: The speed of rotation is related to angular velocity or orbital speed, not eccentricity.
• Option D: The size of the orbit is typically related to the semi - major axis, not eccentricity.

Answer:

B) How elongated an orbit is compared to a circle