- #1
elevenb
- 35
- 1
I was sitting down thinking yesterday, I know that it was worked out through the ages by various methods. But how did we come to the value which we have today? All I can seem to find on the subject is this https://heasarc.gsfc.nasa.gov/docs/cosmic/earth_info.html which says that it is determined by orbiting spacecraft ; does anyone have any links to papers with information on the subject?
Regards,
Mark
Regards,
Mark