Vocab 30 Flashcards
Earth-centric model of the solar system
geocentric model
Sun-centered model of the solar system
heliocentric model
planets in orbit around another star
extrasolar planets
who discovered the Geocentric Model?
Ptolemy
who discovered the Heliocentric Model?
Nicholas Copernicus
Who supported the Heliocentric Model?
Galileo Galilei
Who discovered the planets travel around the Sun?
Johannes Kepler
Do planets travel at different speeds in their orbit?
yes
What is a astronomical unit?
the average distance from Earth to the Sun. (about 150 km from Earth to Sun)
What are the planets called that are similar to planets?
terrestrial planets
Which planets are similar to Earth?
Mercury, Venus, Mars
What are the gas giants know as?
Jovian planets
What are the Jovian planets?
Jupiter, Saturn, Neptune, Uranus
What are the planets known as when they are located between the Sun and Asteroid Belt?
Inner Planets
Which planets are inner planets?
Mars, Venus, Mercury, Earth