dbirds wrote:Those numbers are all bogus!
Estimates based on the evidence currently available. They may well be revised as more information is collected, but they are not bogus.
The estimate is variable, but not by a very large degree. At the Hayden Planetarium (where Dr. Neil deGrasse Tyson is director), the estimate age of the universe is 13 billion years. When Dr. Carl Sagan presented Cosmos
(1980), the estimate was 15 billion. As for the earth, I've heard and read estimates of anywhere between 4.3 billion and 4.8 billion, with the Moon perhaps 500 million years younger, some of its material having come from the Earth after an object the size of Mercury or Mars (or somewhere in between) smashing into it.