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Solar system

TermDefinition
Astronomical unit Used to measure far distances in space 1 au=distance from earth to sun
Meteoroid Chunk of rock smaller than asteroid
Meteor Streak of light
Meteorite Space rock found on earth
Asteroid Millions of small rocky objests that orbit the Sun in the asteroid belt between mars and Jupiter.
Comets Made of gas, dust, and ice, revolve around the sun in the Kuiper Belt and Oort Cloud
Inner planets -terrestrial planets -solid and rocky -Mercury, Venus , Earth, Mars
Outer planets -gas giants -made of ice and gas -Jupiter Saturn Uranus Neptune -rings and moons -hydrogen and helium
Planet Spherical, orbits the Sun, clears its orbit
Mercury -Closest planet to the sun -not the hottest-so small it lacks gravity and atmosphere
Venus -hottest planet -greenhouse effect -day is longer than a year rotation -acid clouds
Earth -only planet with known life -moderate temperatures -protective atmosphere -liquid water
Mars -largest known mountain Olympus mons -possible signs of life
Terrestrial planets The four inner planets
Greenhouse effect Occurs when a planets atmosphere traps solar energy and causes the temperature to increase
Jupiter -Largest planet -Galilean moons -great red spot
Saturn -most complex ring system -least dense planet-it would float -titan-largest moon
Uranus -rotation axis is tilted 90 degrees so it rotates like a bowling ball
Neptune -Longest period of revolution -swirling storms-windiest planet
Gas giants Jupiter, Saturn, Uranus, Neptune-4 outer planets
Galilean moons 4 moons Galileo discovered around Jupiter Io,Europa,Ganymede,Callisto
Dwarf planet -Pluto was the first -same as planet but not larger than its neighbors -ceres in the asteroid belt
Created by: user-1979331
 

 



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