Chapter 30 vocab Flashcards
the solar system, Earth is considered the center and everything else revolves it
geocentric model
states that the moon revolves around earth and that Earth and the other planets revolve around the sun
heliocentric model
are in orbit around stars other than the sun
extrasolar planet
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 that travel around the sun in an ellipse
Johannes Kepler
true or false: do planets travel at different speeds in their orbit
True
how far is an astronomical unit (AU)
the average distance from Earth to the sun is about 150 million km
what are the names of planets that are similar to earth
terrestrial planets
which planets are considered to be terrestrial planets
Mars, Mercury, Venus
what are the gas planets also known as
Jovian Planets
what are the names of the Jovian Planets
Saturn, Neptune, Jupiter, Uranus
what are the two names of the planets that are within and beyond the astroidbelt
inner planets and outer planets
which planets are considered to be inner planets
Mercury, Venus, Mars, and Earth
