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Space

TermDefinition
Meteor a streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere.
comet A ball of ice, dust, and frozen gases that orbits the sun.
rotation the spinning motion of a planet on its axis.
gravity the attractive force between two objects.
probe a robotic spacecraft that leaves Earth’s orbit and explores space.
satllite any object that revolves around another object in space. Can be artificial or natural like the moon
astreoid belt any of thousands of dense rocky objects in orbit around the sun between Mars and Jupiter.
lunar eclipse occurs when the Earth is between the sun and moon. Sunlight is blocked by the Earth.
axial tilt the invisible axis that are tilted allowing for seasons to occur.
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.
greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without an atmosphere.
revolution the movement of an object around another object.
celestial objects Known collectively by astronomers as celestial bodies, astronomical objects, and astronomical bodies, they are the stuff that fills the empty space of the universe.
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.
tides the rise and fall of sea levels caused by the combined effects of gravitational forces exerted by the Moon.
illuminated to light up.the moon is illuminated by the sun
autumn the season between summer and winter known as fall in North America.
survivable temperatures the highest and lowest temperatures that humans can stand without dying
solstice the time and date when the sun is at its greatest distance from the equator; length of day and night show greatest difference
diameter a straight line passing from side to side through the center of a circle or sphere the measurement from one side of a circle/sphere to the other side as you pass directly through the center. The equator is the diameter of the Earth.
astronomer the study of celestial objects (stars, galaxies, planets, moons, asteroids, comets and nebulae) and all phenomena that originate outside the atmosphere of Earth
solar eclipse occurs during the NEW MOON PHASE when the moon passes between the Sun and Earth, and the moon fully or partially blocks the Sun.
axial tilt the invisible axis that are tilted allowing for seasons to occur.
equinox the time and date when the sun passes directly over the equator; the length of day and night are equal 12 hours each
Created by: Okcfan
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