Solar System Word Lists

and Word Search Games

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The Solar System formed 4.6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud.

The Solar System comprises the Sun and the planetary system that orbits it, either directly or indirectly. Of those objects that orbit the Sun directly, the largest eight are the pl…

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Spaceflight (also written space flight) is ballistic flight into or through outer space.

Spaceflight can occur with spacecraft with or without humans on board. Examples of human spaceflight include the U.S. Apollo Moon landing and Space Shuttle programs and the Russian Soyuz program, as well as the…

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There are eight planets in the Solar System, which are in increasing distance from the Sun.

A planet is an astronomical object orbiting a star, brown dwarf, or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleare…

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