Question

How long is an eon?

Answer 1

1. An eon is a geological time unit equivalent to a billion years, or an extremely long span of time.
2. When discussing how long ago the solar system was founded, an eon is an example of a unit of measure.
3. The time since dinosaurs roamed the earth is a good illustration of an eon.
4. An eon is a period of time equal to one billion years or 1,000,000,000 years. The word is of Greek origin and approximately translates to "age."