3 Pages
Unlock Document

Queen's University
Physics, Engineering Physics and Astronomy
ASTR 101

Galileo • Lived far away from Kepler however they were aware of each others' work  Galileo was more rational and can be considered the first scientist who needed empirical evidence, challenging Aristotle's notion that thought alone can lead to deep physical understanding  Kepler was more mystic and a mathematician that did not explore why the planets move the way they do, just how • Galileo introduced the concept of inertia: a body in a state of motion will continue in that state of motion unless an external force acts upon it (eventually became Newton's first law)  Showed that heavier objects fall to the ground faster than light objects because air resistance was greater on the feather, removing external factors like friction or air resistance, they fall at the same speed • Relativity: pointed out that movement is relative and there needs to be a reference frame where movement in one frame will appear different in the other depending on point of view  Example: Dropping a ball off a moving car appears to fall straight down from above, but for an observer standing on the side of the road the ball appears to curve  There is no way to determine that the car is the object moving vs everything else around it  Galileo argued that although we do not feel Earth moving through space, since the air and atmosphere are carried with it through an environment of just empty space (no limiting factors except gravity)  Contrary to Aristotle, Galileo argued if Earth were set on a new course through space it would never stop moving in that direction (assuming no other limiting factors)  Argued that us not being able to physically feel ourselves moving through space was not an argument for us remaining at rest • Galileo did not invent the telescope, however he was the first to point it to the stars and publish his findings  Discovered many things such as mountains on the moon, sunspots, rings on Saturn, moons of other planets, and the stars in the milky way
More Less

Related notes for ASTR 101

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.