AST201 Lecture 5

2 Pages
37 Views
Unlock Document

Department
Astronomy & Astrophysics
Course
AST201H1
Professor
Michael Reid
Semester
Winter

Description
AST201 Lecture 5 Tuesday, January 21, 2014 -unique prediction of General Relativity (not found in Newton’s theory) that light will bend as it passes large object -Gravitational lensing= the bending of light by large objects/bodies -anything with mass curves space -Dark Matter included -Escape Speed -speed needed to escape the gravitational pull of a planet/body -must reach this speed to get out of orbital path -11km/s is the escape speed -certain speed needed to reach a circular orbit -if you compressed the Earth the escape speed would actually go up because the closer you are to an object’s centre of gravity the larger the gravitational pull is -once the escape speed reaches the speed of light nothing can escape -this is what we call a Black Hole -you’ve have bent space-time as much as you can possibly bend it -maybe even torn space-time but we don’t know -from the perspective of someone outside the black hole it would look
More Less

Related notes for AST201H1

Log In


OR

Join OneClass

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

Sign up

Join to view


OR

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.


Submit