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Space unit

TermDefinition
Meteor a streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere
asteroid belt any of thousands of dense rocky objects in orbit around the sun between Mars and Jupiter.
comet A ball of ice, dust, and frozen gases that orbits the sun.
revolution the movement of an object around another object.
rotation the spinning motion of a planet on its axis.
outer planets gas giant planets found outside of the asteroid belt
inner planets terrestrial (earth-like) planets that are dense solids located between the sun and the asteroid belt.
gravity the attractive force between two objects.
axial tilt the invisible axis that are tilted allowing for seasons to occur.
probe a robotic spacecraft that leaves Earth’s orbit and explores space.
satellite any object that revolves around another object in space. Can be artificial or natural like the
Heliocentric Theory Nicolaus Copernicus’ idea that the Earth, planets, and stars all revolved around the Sun.
Geocentric Theory Aristotle & Ptolemy believed that the Earth was the center of the Universe and all objects revolved around it
tides the rise and fall of sea levels caused by the combined effects of gravitational forces exerted by the Moon.
Created by: badgirl24
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