- Feb 17, 2005
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The Universe is approximately 14 billion years old. About 400,000 after the Big Bang, the first light appeared. We have seen and measured this light. It is the Cosmic Microwave Background Radiation. It has been traveling to us for nearly 14 billion years at the speed of light.
So, since time slows down the faster something goes, and these things are going as fast as things can go, how old are they within their own frame of reference? Are they 14 billion years old? Are they 0?
In Cosmos, Carl Sagan said that at speeds approaching the speed of light, we could circumnavigate the known universe in "some 56 years". What's the math?
So, since time slows down the faster something goes, and these things are going as fast as things can go, how old are they within their own frame of reference? Are they 14 billion years old? Are they 0?
In Cosmos, Carl Sagan said that at speeds approaching the speed of light, we could circumnavigate the known universe in "some 56 years". What's the math?
