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Space unit


Metor a streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere.
Asteroid Any if thousands or 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.
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 moon.
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.
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.
illuminated to light up
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.
lunar eclipse occurs when the Earth is between the sun and moon. Sunlight is blocked by the 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.
autumn the season between summer and winter known as fall in North America.
equinox the time and date when the sun passes directly over the equator; the length of day and night are equal (12 hours each)
solstice the time and date when the sun is at its greatest distance from the equator; length of day and night show greatest difference.
orbit revolve around circle around go around travel around
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.
survivable temperatures the highest and lowest temperatures that humans can stand without dying.
astronomer the study of celestial objects (stars, galaxies, planets, moons, asteroids, comets and nebulae) and all phenomena that originate outside the atmosphere of Earth
Created by: Prettyangel