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Printable 3rd grade astronomy worksheet with questions about planets, moons, the Solar System, and space exploration.
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Pocket Solar System: Astronomy Science Experiment

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This printable astronomy worksheet for 3rd graders covers the Solar System with 18 open-response questions. Students answer questions about planets, moons, asteroids, the Kuiper Belt, inner and outer planets, and space exploration tools like the Hubble Space Telescope and space probes. Use it for science vocabulary review, classwork, or a unit assessment on space.

Subject:
Science
Topic:
Astronomy
Grade Level:
3rd Grade
Updated April 2026

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