Ages of Stars and Planets
Name: Tammy L
Date: 1993 - 1999
How many years has there been a moon and an earth?
The Earth has been around for between 4.5 and 4.6 billion years,
according to the most recent estimates I'm 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.
Click here to return to the Astronomy Archives
Update: June 2012