Ch 30.1 Flashcards
What does geocentric model mean?
Earth is considered the center of everything and everything revolves around it.
What does heliocentric model mean?
The Moon revolves around the Earth and the Earth and other planets revolve around the Sun.
What does extrasolar planet mean?
Planets in orbit around stars other than the Sun.
who came up with the geocentric model
Greek philosopher Ptolemy
Who came up with the heliocentric model
Nicholas Copernicus
Who supported Copernicus’s model by using a telescope
Galileo Galilei
Who discovered the planets travel around the Sun in ellipses
Johannes Kepler
Do planets travel at different speeds in there orbit
Yes
an astronomer unit (AU) equals
about 150 million km
what planets are similar to Earth
terrestrial planets
what plants are the terrestrial planets
venus, mars, mercury
what plants are the terrestrial planets
Jovian Planets
name the gas giants
jupiter, saturn, uranus, neptune
what are the name of the planets that are within the asteroid belt and beyond the asteroid belt
inner planets
what planets are considered inner planets
mars, earth, venus, mercury
