1. Brief History Flashcards
1
Q
What is the geocentric model?
A
Earth is at the centre of the Universe and planets revolve around Earth
2
Q
What observations didn’t agree with the geocentric model?
A
- Venus was never observed to be far away from the sun
- Retrograde motion of Mars
3
Q
What is the heliocentric model?
A
Sun is at the centre of the Universe and planets revolve around it
- Works for our SS
4
Q
State the cosmological principle
A
Nothing is priviledged about our position in the universe
