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Space Vocabulary

5th period science

Rotation The spin of an object in space.
Revolution The elliptical motion of a body as it travels around another more massive body in space.
Orbit The elliptical path an object takes in space while revolving around another object.
Gravity Attracting force due to mass or rotation.
Atmosphere Mixture of gases that surround a planet.
Sun A medium sized star;the center of our solar system.
Planet A body that orbits around the sun or a star and does not produce its own light.
Terrestrial Planet A small, dense rock planet similar to Earth.
Gas Giant A large, gaseous planet of the outer solar system with no known solid surface.
Natural Satellite A smaller body that orbits around a larger body.
Moon A natural satellite of a planet.
Artificial Satellite Any human made object placed in orbit around an object in space.
Comet A small body of ice, rock, and cosmic dust loosely packed together.
Meteoroid A very small, rocky body found in space.
Meteorite A meteoroid that reaches Earth's surface without burning up completely.
Meteor A bright streak of light caused when a meteoroid or comet dust burns up in the atmosphere.
Thrust The force that accelerates a rocket.
Orbital Velocity The speed and direction a rocket must have in order to orbit Earth.
Escape Velocity The speed and direction a rocket must have in order to completely break away from a planet's gravitational pull.
Centripetal Force The force that causes an object to follow a curved path.
Asteroid A small,rocky body that revolves around the sun.
Created by: fairytailfan