Class Notes (809,569)
United States (313,690)
Astronomy (29)

Astronomy 102 Sept 6th.docx

2 Pages
Unlock Document

Boston University
CAS AS 102
Merav Opher

Astronomy 102 Day 1 Notes September 6th Scientific Method ● Milky way is part of a group of galaxies called the local group ● 1 astronomical unit (AU) is the distance from the sun to the earth ● Light is the fastest thing that moves ● light travels at 300000 km= 670,616,629 mph every second ● Light would travel are the Earth in 1/7 of a second ● In 1.25 second, light travels from Earth to the moon ● Voyager spacecrafts move at 3AU a year ● The distance from Earth to the closest star is 4 years ● For us to get to the cloest galaxy to us,Andromeda, it would take 3.5 million years ● The age of the universe is 13.7 billion years, so any light farther than that hasnt had time to arrive to us yet ● Observable universal is our universe that is 13.6 billion years old, the stuff that we can see ● Except for hydrogen, all of the atoms in our body were made in stars ● The beginning of the universe did not create heavy elements ● Dying stars eject these elements into space in massive explosions ● New stars and planets (and humans) are formed What is the Scientific Method? ● Test scientific ideas
More Less

Related notes for CAS AS 102

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.