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Astronomy
Science related flash cards
Term | Definition |
---|---|
Gravity | A physical force of nature that causes two bodies to attract each other. |
Force | A push or pull upon an object resulting from the interaction with another object. |
Galaxy | A grouping of billions of stars. Ours is known as the Milky Way. |
Universe | All existing matter and space considered as a whole. |
Asteroid | A small planetary body in orbit around the Sun, larger than a meteoroid but smaller than a planet. |
Comet | A gigantic ball of ice and rock that orbit the Sun. |
Meteor | A small particle of rock or dust that burns away in the Earth's atmosphere. |
Inner Planets | The 4 closest planets to the sun: Mercury, Venus, Earth, and Mars. |
Outer Planets | The 4 farthest planets from the sun, also known as the gas giants: Jupiter, Saturn, Uranus, and Neptune |
Orbit | The path of a celestial body as it moves through space. |