AST201 Lecture 6Thursday.docx

2 Pages
103 Views
Unlock Document

Department
Astronomy & Astrophysics
Course
AST201H1
Professor
Michael Reid
Semester
Winter

Description
AST201 Lecture 6 Thursday, January 23, 2014 -a supernova is an explosion of a star, which tears it apart in seconds -end of life for the star -sometimes when a star is very close the supernova can be seen during the day -hasn’t happened in our lifetime -in order to locate a black hole we look for objects orbiting something that cannot be seen -first conclusive bit of evidence for the existence of black holes came from people at UofT -were studying stars in the constellation Cygnus -noticed objects were orbiting something that wasn’t there -by working out the orbit of the star they were able to work out the mass of the invisible object -was devouring Cygnus X-1 -the X-rays we see coming from Cygnus X-1 is hot material just outside the event horizon -not coming from the black hole itself, black holes emit nothing since nothing escapes them -has a mass 15 times greater than the Sun and i
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