Ugh! This is where I'm forced to accept the double-edged nature of that invaluable tool, the internet. It affords one the practically limitless availability of a treasure trove of encyclopedic knowledge, but has the unfortunate tendency to make users mistake Googling for "researching," or "studying."<quoted text>
Ok I see now. I Googled it.
The earth is billions4.54 billion years old.
Our moon however is only 4.52 billion years old, and has been with us ever since.
Must have been neat for that time with no moon.:)
Smart men out there bit.
I'll make this as brief as I'm able. To determine the age of any given sample of rock, you measure the amount of radioactive material it contains. As a rock ages, the radioactive atoms it contains decay into what are called "daughter atoms." Uranium decays into lead, radioactive potassium decays into argon. The more "daughter atoms" a rock contains, relative to its original radioactive atoms, the older the rock is. Studies thus far have shown that the average age of 3.6 billion years yet, many geologists are of the opinion that the earth is even older because samples taken from other sources if the solar system--the Moon for example--have been aged at approximately 4.5 billion years.
Now, the way scientists have calculated the age of the Universe they've set forth an equation.
The universe's age is represented by "t." Two representative galaxies are then used to measure distance "D," with a velocity "V." To make this easier, it's assumed that "V" is a constant. The equation that follows is D=Vt, or distance equals velocity multiplied by time. To find out how long ago the galaxies began to move away from one another you divide distance by velocity, or t=D/V.
Is it exact? Of course not. But it's a close as one can come to "objectively" measuring the available data and so far, the data presented has held up quite well.
Then you have the whole "Intelligent Design" crowd from the "Discovery Institute" who, would not have engendered the scorn of the majority of the scientific community mainly for being thoroughly dishonest about their aims.