Astronomy Practice Exam 2025 – Complete Preparation Guide

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Which term is used to describe objects that orbit a planet?

Stars

Asteroids

Moons

The term that is used to describe objects that orbit a planet is "moons." Moons are natural satellites that are held in orbit around planets by the force of gravity. They can vary greatly in size and composition, with some being relatively small and rocky, while others can be quite large and composed of ice.

In contrast, stars are massive celestial bodies that generate energy through nuclear fusion, and they are not found in orbit around planets. Asteroids are primarily found in the asteroid belt between Mars and Jupiter; they are generally smaller and do not orbit planets in the same way moons do. Galaxies are vast collections of stars, gas, dust, and dark matter, and they are structures that contain millions to billions of stars, rather than being objects that orbit planets. Thus, moons are the specific objects that fulfill the criteria of orbiting a planet.

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Galaxies

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