Astronomy Flashcards
1
Q
Geocentric model
A
Ptolemy who was Greek
He put earth in the centre of everything with the planets and the Sun orbiting around the Earth
2
Q
Heliocentric model
A
Nicolaus Copernicus
15th century
Decided the sun was at the centre of everything
3
Q
How did we know that heliocentric was the correct model
A
 Galileo Galilei in the 17th century used a telescope to observe four of Jupiters moons that he discovered. He plotted their movements and showed that not everything orbited the Earth which led him to support the heliocentric model
4
Q
Comets
A
Are made of ice
5
Q
Current solar system
A
 eight planets five dwarf planets comets asteroids
These all move in elliptical orbits around the Sun
Some planets have moons orbiting around and which are natural satellites
