How do we know Einstein has it right?

Question

We constantly say that Einstein’s General and Special theories of relativity have passed many different tests, insenuating their accuracy.

Before Einsten, we tested Isaac Newton’s theories, which also passed with accuracy until Einstein came along.

What’s to say another Einstein/Newton comes along 200-300 years from now to dispute Einstein’s theories?

Is that even possible or are his theories grounded in certainty at this point?

In: 593

Answer 1

GPS satellites move very fast. They have very very accurate atomic clocks. They are subject to lower gravity than if they were on the ground. They need to communicate with ground-based atomic clocks. These things mean time dilation would be a problem and have calculated the effect that dilation has so the GPS satellites account for this.