Age of earth dating

The Sun must be shrinking for this explanation to work.

Turn the clock backwards, and at some point, the Sun must have extended past Earth’s orbit.

In 1953, Clair Cameron Patterson measured the abundances of three isotopes of lead in meteorites and calculated that the Earth must be about 4.6 billion years old.“How big” is almost always an easier question to answer than “how old.” Though we can measure the sizes of animals and plants easily enough, we can often only guess at their ages. The ancient Greeks Eratosthenes and Aristarchus measured the size of the Earth and Moon, but could not begin to understand how old they were.With space telescopes, we can now even measure the distances to stars thousands of light-years away using parallax, the same geometric technique proposed by Aristarchus, but no new technology can overcome the fundamental mismatch between the human lifespan and the timescales of the Earth, stars, and universe itself.In the early twentieth century, it was discovered that some chemical elements decay into others at highly stable rates.By measuring these rates, and the relative amounts of parent and daughter atoms in a rock, scientists could measure how long it had been since the rock solidified.

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