Ask A Scientist©

Astronomy Archive

Ages of planets

Author:      tammy l
How many years has there been a Moon and an Earth?

Response #:  1 of 1
Author:      asmith
The Earth has been around for between 4.5 and 4.6 billion years, according
to the most recent estimates I am aware of.  The Moon is probably no more
than a few hundred million years younger than the Earth.  This is actually a
substantial fraction of the age of the whole universe (between 9 and 15
billion years) - so the Earth is pretty old by just about any standard.

Back to Astronomy	Ask A Scientist Index
NEWTON Homepage	Ask A Question

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators.
Argonne National Laboratory, Division of Educational Programs, Harold Myron, Ph.D., Division Director.