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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 Earth’s atmosphere
Comet A cold mixture of dust and ice that develops a long trail of light
Geocentric Earth-centered model
Heliocentric Sun-centered model
Astronomy The study of space
Ellipse Orbit of each planet
Axis Imaginary line that passes from the North Pole to the South Pole
Rotation Spinning of earth on its axis
Revolution The movement of one object around another
Orbit Earths path around the sun
Solstice Earth is most tilted toward the sun or away from the sun
Equinox Earth is not tilted toward the sun which causes equal day and night
Gravity Force that attracts all objects toward each other
Law of universal gravitation Every object in the universe attracts every other object
Phase Different shape of the moon you see
Solar eclipses When the moon passes directly between the Earth and Sun during a new moon
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 tides Lower high tides during the first and third quarter moons
Maria Dark, smooth, lava covered areas on the moon
Highlands Higher lighter areas on the moon covered with craters
Weight Force of gravity on an object
Sun Largest object in our solar system
Constellations A pattern or group of stars that people imagine represents a figure, animal, or object
Created by: user-1979302
 

 



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