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20 Cards in this Set
- Front
- Back
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Thrust
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The force of gases pushing against the top of combustion chamber that becomes greater than the force of gravity.
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Orbital Velocity
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The speed and direction a rocket must have in order to orbit the Earth.
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Escape Velocity
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Is the speed and direction a rocket must move in order to completely break away from a planet's gravitational pull.
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Geosynchronous Orbit
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A satellite moves around the Earth at a speed that exactly matches the rotational speed of the Earth. This keeps the satellite above the same spot on Earth at all times.
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Low Earth Orbit
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Early satellites where placed a few hundred km above the Earths surface in the outer most part of the earths atmosphere.
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Satellite
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An Artificial Satellite is a human made object placed in orbit around a body in space. They can also be natural body's called moons.
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Rotation
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The spinning of an object in space on its axis.
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Revolution
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The motion of a body as it travels around another body in space (travels on a orbit) ex: The Earth's travel around the sun is 365 days.
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Nuclear Fusion
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The process by which two or more low-mass nuclei join together or fuse to form a more massive nucleus. This process produces a lot of energy.
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Sunspot
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Cooler, dark spots on the sun.
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Solar Flare
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Giant storms on the suns surface that send huge streams of electrically charged particles out into the solar system.
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Terrestrial Planet
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The inner planets that are small, dense and rocky.
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Gas Giant
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Are very large outer planets that don't have any known solid surfaces. Their atmospheres blend smoothly into the denser layers of their interiors.
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Comet
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A small body of ice, rock, and cosmic dust loosely packed together.
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Asteroid
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Small rocky bodies that revolve around the sun.
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Meteoroid
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Small rocky bodies that revolve around the sun, much smaller than astroids.
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Meteorite
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When a meteoroid hits the ground.
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Meteor
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The bright streaks of light caused when a meteoroid or comet dust burns up in the atmosphere.
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Prograde Rotation
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When a planet spins in a counterclockwise direction when viewed from above its North Pole.
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Retrograde Rotation
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If a planet spins in a clockwise direction.
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