Gravitational time dilation is a phenomenon in which time passes at different rates in different gravitational fields. This is due to the curvature of spacetime caused by massive objects like planets and stars.
According to Einstein's theory of general relativity, massive objects cause a distortion in the fabric of spacetime. This distortion affects the flow of time, causing it to pass at different rates in different gravitational fields.
The stronger the gravitational field, the slower time will pass. This means that objects closer to massive objects like planets or stars will experience time passing slower than objects farther away.
Gravitational time dilation can be measured by comparing clocks in different gravitational fields. For example, a clock on the surface of the Earth will run slightly slower than a clock on a satellite in orbit due to the difference in gravitational fields.
Yes, gravitational time dilation is an important factor in GPS systems and other technologies that rely on accurate timekeeping. It also plays a role in the study of black holes and other astronomical phenomena.