|
Distances to the Stars - The Parallax Method.
|
No good quote yet.
|
Read Chapter 26.1-6. Read sections 2-5 chapter 4, chpater 5 as preperation for next week.. HW#3 and HW#4 are now available. Watch the third CD movie (guided tour) on lives of stars. |
| Announcements:
Hellp Session yesterday was cancelled.
Regarding subject matter: How come a photon takes 1 million years to get out of the sun? (Sun radius 7 x 10^8 m. Speed of light 3x10^8 m. Should be 2 1/3 second???) "Drunk photon" bumps into nuclei and electrons in the way, goes in random direction, overall ACTUALL trip to the surface: 9 x 10^21 meter!!! That's 1 million light years! Parallax:
Hyparchus satellite story: using a simillar triangle. Tutorial III : To be solved in class, Friday.
|
Go Back