Greek Ideas
Thought they were inside this
What is a rotating dome with stars pasted on it?
Believed in this model/system
What is the geocentric model?
Time that Copernicus' ideas came to be
When is the Early 1500s?
Kepler found that the orbit of a planet is this
What is an ellipse (oval)?
These two things combine to keep the planets in orbit
What is inertia and gravity?
Called the dome this
What is the "celestial sphere"?
Thought the moon and sun revolved around this
What is the Earth?
Idea developed another explanation for this
What is the motion of the planets?
Galileo used this to support the idea
What is a telescope?
The tendency of a moving object to continue in a straight line or a stationary object to remain in place is called this
What is inertia?
Earth is stationed here
What is at the center of the universe?
Said planets moved in this way
What are little circles that moved in bigger circles?
Thought that this was at the center of the systems of revolving planets
What is the Sun?
Saw 4 moons revolving around this planet
What is Jupiter?
The force that attracts all objects to one another
What is gravity?
System where Earth is at the center of the revolving planets
What is the geocentric system?
This explained why planets sometimes moved in this way
What is backwards?
Called this the _____ system
What is the "heliocentric" system?
Saw this planet go through phases
What is Venus?
Strength of gravity depends on these two things
What is the masses of the objects and the distance between them?
Theory believed for this many years
What is 1500 years?
Did not publish his ideas until...
What is after his death?
Was ____ for his ideas
What is persecuted?
The planets stay in orbit around the sun because the sun's ____ pulls on them while their _____ keeps them moving forward
What is gravity and inertia?