Astronomy Practice Exam 2025 – Complete Preparation Guide

The order of the planets from the Sun is based on their proximity, starting from the Sun and moving outward. Mercury is the closest planet to the Sun, followed by Venus, Earth, Mars, and then the gas giants Jupiter and Saturn.

In the correct sequence, Mercury, Venus, Earth, and Mars are the terrestrial planets located within the inner solar system. They are followed by Jupiter, the largest planet, and then Saturn, known for its prominent rings. This sequence accurately reflects the order of the first six planets in our solar system.

The other options either include incorrect planets or mix their positions. For instance, option B introduces Uranus but does not include the first six as requested. Option C positions Saturn incorrectly before Jupiter, which does not follow the proper order. Option D incorrectly places Neptune in the sixth position, which should be Saturn. Thus, the answer that lists Mercury, Venus, Earth, Mars, Jupiter, and Saturn in the correct order is the only accurate one.