Astronomy Practice Exam 2026 – Complete Preparation Guide

Question: 1 / 460

How long is one complete rotation for Venus in Earth days?

365 days

243 days

Venus takes approximately 243 Earth days to complete one full rotation on its axis. This rotation period is notably longer than a Venusian year, which lasts about 225 Earth days. This peculiar situation occurs because Venus has a very slow rotation, combined with a retrograde spin, meaning it rotates in the opposite direction to most planets in the solar system. As a result, a day on Venus (its rotation period) is longer than a year (the time it takes to orbit the Sun). This intrinsic aspect of Venus's rotation highlights the unique dynamics of planetary motions within our solar system.

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256 days

220 days

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