Astronomy Practice Exam 2025 – Complete Preparation Guide

Question: 1 / 460

What is the length of a solar day on Mars?

23 hours 56 minutes

24 hours 39 minutes

24 hours 39 minutes 35 seconds

A solar day on Mars, often referred to as a "sol," is approximately 24 hours, 39 minutes, and 35 seconds. This definition is based on the time it takes for the Sun to return to the same position in the Martian sky, which is slightly longer than an Earth day.

Understanding the unique rotation period of Mars is crucial in the study of its environment and for planning missions to the planet, as it affects everything from solar energy collection to operational timing for rovers and landers. The precision in the measurement to include seconds highlights the differences between planetary rotations, emphasizing Mars as a distinct celestial body with its own rhythms as compared to Earth.

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