Topic 8- Planetary Motion And Gravity

Question 1

What did Brahe do?

Answer 1

He made thousands of accurate and precise observations which contributed significantly to the eventual transition from the geocentric model to the heliocentric

Question 2

What did Kepler do?

Answer 2

Tycho’s observations allowed Kepler to develop his laws on planetary motion. These laws matched observations VERY accurately

Question 3

What did Kepler do?

Answer 3

Tycho’s observations allowed Kepler to develop his laws on planetary motion. These laws matched observations VERY accurately

Question 4

What did Copernicus do?

Answer 4

1.) Put forward the heliocentric theory
2.) ‘Dē revolutionibus orbium coelestium’ (book about all planets that orbited the sun)
3.) Mathematical observations supported this- especially retrograde motion
4.) Wasn’t adapted as quickly
5.) Challenged the Bible

Question 5

What did Tycho do?

Answer 5

1.) Made consistent observations of the motion of planets and it supported the heliocentric model
2.) Did this with only a compass and sextant
3.) Catalogued over 1000 stars
4.) Showed that comets weren’t part of the Earth’s atmosphere
5.) Discovered new star in the Cassiopeia constellation

Question 6

What did Kepler do?

Answer 6

1.) Studied the heliocentric model
2.) Discovered that Mars’ orbit was elliptical
3.) 3 laws of planetary motion

Question 7

What happens if a star has a larger constant?

Answer 7

It means the star is smaller