History of Astronomy

Question 1

What is a key distinction between Keller’s model of the universe compared to previous models?

Answer 1

Kepler was the first to propose that orbits are not perfect circles.

Question 2

Which scientist is credited with developing the mathematical framework to accurately describe the force of gravity and the way forces behave in the universe?

Answer 2

Isaac Newton

Question 3

Which statement in Kepler’s first law proves planetary motion as a heliocentric model?

Answer 3

Planetary motion shows elliptical orbits.

Question 4

Object A and Object B orbit the sun. Object A is observed to orbit the Sun every 64 years. Object B is observed to orbit the Sun every 125 years. What statement can you make about their relative distance from the Sun?

Answer 4

Object A is closer to the Sun than Object B.