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Space Exploration Unit 9 . Critical Vocabulary . Inertia. Inertia is the resistance of any physical object to any change in its state of motion, including changes to its speed and direction. . Universe.
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Space Exploration Unit 9 Critical Vocabulary
Inertia Inertia is the resistance of any physical object to any change in its state of motion, including changes to its speed and direction.
Universe The Universe is the totality (all) of existence. This includes planets, stars, galaxies, the contents of intergalactic space, the smallest subatomic particles, and all matter and energy. EVERYTHING!
Galaxy A galaxy is a massive, gravitationally bound system consisting of stars, stellar remnants, an interstellar medium of gas and dust, and dark matter.