Question

what is the age of planets

Answer 1

Some of these samples have been dated to 4.5 billion years old, supporting other calculations of the date of early planetary formation. More than 70 meteorites have fallen to Earth to have their ages calculated by radiometric dating. The oldest of these have ages between 4.4 and 4.5 billion years.

Answer 2

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We're pretty sure that the entire solar system, the sun, the earth, all the planets are something like 4.6 billion years old, again, give or take a few million years. This is a very large large number type problem that we're dealing with here.

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