- #1
wg1337
- 11
- 0
Hi!
I have a homework at school and one question in it is to show how AU is defined.
So of course I took google and saw - 1 AU is the distance from Earth to Sun (or the radius of Earth orbit).
But distance from where? From the center of planet or from the surface?
I have seen some illustrations and all they seem to show the distance from center, but my physics book seems to show different.
Won't be first time when the book gives a wrong answer.
The same goes for parsec - http://coolcosmos.ipac.caltech.edu/cosmic_classroom/cosmic_reference/images/parsec.gif
I have a homework at school and one question in it is to show how AU is defined.
So of course I took google and saw - 1 AU is the distance from Earth to Sun (or the radius of Earth orbit).
But distance from where? From the center of planet or from the surface?
I have seen some illustrations and all they seem to show the distance from center, but my physics book seems to show different.
Won't be first time when the book gives a wrong answer.
The same goes for parsec - http://coolcosmos.ipac.caltech.edu/cosmic_classroom/cosmic_reference/images/parsec.gif