Planet - Something that orbits a star., Solar System - A star with different bodies orbiting around it., Orbit - The curved path of a planet around a star., Galaxy - A system of billions of stars, Universe - All of space and time., Star - A giant exploding ball of gas., Atmosphere - A layer of air around a planet., Eclipse - When the moon blocks out the sun., Satellite - A man-made object that orbits the Earth., Moon - A natural satellite which orbits the Earth, Erosion - Broken down material moving from one place to another., Weathering - Material breaking down over time.,

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