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Sun-earth-moon

TermDefinition
Satellite A body that orbits a planet
Star A giant ball of superheated gas, or plasma, composed of hydrogen and helium.
Planet Spherical, orbits the sun, with a larger mass than nearby objects
Meteor A streak of light produced when a small piece of rock or ice, burns up as it enters earths atmosphere.
Comet A cold mixture of dust and ice that develops a long trail of light as it approaches the sun.
Constellation A group of stars that make a symbol and it only appears for a couple moths a year.
Geocentric Earth centered model
Heliocentric A sun centered model
Ellipse An oval shape
Sun The only star in are solar system
Axis An imaginary line that passes from the North Pole through the earths center, to the South Pole.
Rotation The spinning of earth on its axis.
Revolution The movement of one object around another.
Orbit Earth’s path around the sun.
Solstice One day per year when the sun appears highest in the sun.
Equinox Night and day are both 12 hours long.
Gravity This force that attracts all objects toward each other
Law of universal gravitation Every object in the universe attracts every other object.
Inertia The tendency of an object to resist a change in motion.
Phase Different shape of the moon you see.
Solar eclipse When the moon passes directly between the earth and sun.
Lunar eclipse Occurs during a full moon when earth is directly between the moon and sun.
Umbra Darkest part of a shadow where light is completely blocked.
Penumbra Area of a shadow where light is partially blocked
Tide Daily rise and fall of ocean water
Spring tide Higher high tides during full and new moons
Neap tide Lower high tides during a first and third quarter moon.
Maria Dark, smooth lava covered areas on the moon.
Highlands Higher lighter areas on the moon covered with craters
Created by: user-1978845
 

 



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