Earth’s gravitational time dilation is completely negligible. The difference it makes in Earth’s age is much less than our uncertainty about that age.

Try calculating $\frac{2GM}{c^2R}$ to see how little the time dilation factor differs from $1$ A at the surface. Hint: $\frac{2GM}{c^2}$ is about $9$ millimeters, while $R$ is about $6400$ kilometers!

  The time dilation at the center of the Earth is a bit different but equally negligible.

Earth’s gravitational time dilation is completely negligible. The difference it makes in Earth’s age is much less than our uncertainty about that age.

Try calculating $\frac{2GM}{c^2R}$ to see how little the time dilation factor differs from $1$ at the surface. Hint: $\frac{2GM}{c^2}$ is about $9$ millimeters, while $R$ is about $6400$ kilometers! The time dilation at the center of the Earth is a bit different but equally negligible.

You can start worrying about gravitational time dilation when you travel to a neutron star or a black hole. Otherwise, you can forget that it exists unless you are doing ultra-precise experiments, navigating interplanetary spacecraft, or designing GPS systems.

Earth’s gravitational time dilation is negligible. The difference it makes in Earth’s age is much less than our uncertainty about that age.

Try calculating $\frac{2GM}{c^2R}$ to see how little the time dilation factor differs from $1$.

Earth’s gravitational time dilation is completely negligible. The difference it makes in Earth’s age is much less than our uncertainty about that age.

Try calculating $\frac{2GM}{c^2R}$ to see how little the time dilation factor differs from $1$ A at the surface. Hint: $\frac{2GM}{c^2}$ is about $9$ millimeters, while $R$ is about $6400$ kilometers!

The time dilation at the center of the Earth is a bit different but equally negligible.