Age of rocks and celestial objects versus their current positions

  • Thread starter Thread starter Uncle Charles
  • Start date Start date
Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
Sign up Log in
2 replies · 603 views
Uncle Charles
Greetings to everyone; I have been working as an accountant for 49+ years with this Company. I enjoy trying to make sense of very old written and oral histories.

Astronomy is great now but even better when actual history is used to tell us what happened to create what we see now!

The rock in my flower bed is about 120 million years old. But it has been where my garden surrounds it only about 17 thousand years. The moon may be 3.2 billion year old but only less than the rock in my garden has it been where you see it. By the way it is getting about 3 inches further away every year.
 
Last edited by a moderator:

Discussion

Physics news on Phys.org
Uncle Charles said:
The rock in my flower bed is about 120 million years old. But it has been where my garden surrounds it only about 17 thousand years.
Based on where you live, that's not surprising. The Cordilleran Ice Sheet that retreated about 14,000 years ago left lots of erratics lying around.

Uncle Charles said:
The moon may be 3.2 billion year old but only less than the rock in my garden has it been where you see it.
Not sure what to make of this statement. As I understand things, the composition of the moon is the same as that of the earth, and one conjecture is that it was ejected from the Earth after some large object hit the earth. Is your point about the moon not being where you see it, that it is moving away?