30.1 Flashcards
geocentric model
a superseded description of the Universe with Earth at the center.
heliocentric model
Earth and planets revolve around the Sun at the center of the Solar System.
extrasolar planet
a planet outside the Solar System.
who came up with the Geocentric Model
Greek Philosopher Ptolemy
who came up the Heliocentric Model
Nicholas Copernicus
who supported the Heliocentric
Galileo Galilei
who discovered the planets move in an ellipses
Johannes Kepler
Do planets travel at different speeds
true/false
true
an astronomical unit (AU) equals _________
the average distance from the earth to the sun (150 million km)
planets similar to Earth are called ________ Planets
terrestrial
what planets are considered terrestrial planets
venus, mars, mercury
Giant planets are known as _________ planets
Jovian
what planets are Jovian planets
Jupiter, Saturn, Uranus, Neptune
what are the two names of the planets that are that are in the asteroid belt and beyond the asteroid belt
inner and outer
What planets are considered inner planets
mercury, venus, earth, mars
