Why is time on earth and time in space different?

Question

Leah Angelini · Accepted Answer

Because of gravity time dependence..

If you have heard of #color (red)(F_g=(GMm)/r^2)# and you think it is correct. Sorry to say but no it isn't. If you feel a little cheated in school, you are not the only one. #F_g=(GMm)/r^2# is literally a really good approximation but the fact that relativistic effects are not included in this formula can't be denied. According to the Newtonian concept, time is absolute; however, Einstein postulated that "time isn't absolute but relative" and that gravity was merely a curvature in spacetime, or four dimensions, rather than a force. He also noted that heavy masses curve spacetime more than light ones do, and that time would move more quickly in free space than in a region where gravity is present.

Alice Andrews · Answer

Time is a variable. Time changes in the proximity to mass.

According to the theory of relativity, gravity is the result of mass acting on the space-time continuum. The impact of mass on space predicted that light would bend as it entered a gravitational field because it would spend more time there. This prediction was validated by observations of stars during a total eclipse. The theory of relativity states that time stops, or ceases to exist, at the speed of light. This means that light traveling across the universe takes no time at all to cover an infinite distance. It is difficult to imagine, but the theory also states that time stops or ceases to exist at the singularity of a black hole, meaning that people who are close to or near one would experience time at a much slower rate, with children in less extreme gravity growing older and eventually dying, while those who are close to the black hole would hardly age at all.

Theodore Angelis · Answer

Time on Earth and time in space are different because of relativistic time dilation.

Relativity asserts that time is the fourth dimension of spacetime, which has some significant ramifications for the ideas of Isaac Newton, who saw time as moving at the same speed for every observer. Albert Einstein showed that mass and energy are equivalent with his famous equation #E=mc^2#. He also showed that mass and energy cause spacetime to curve. Gravity is the effect of this curvature. Time slows down due to both mass and velocity. While time appears to be moving normally to an observer outside of the gravitational field or on a fast-moving ship, time actually slows down due to both mass and velocity. When in orbit, whether it be around Earth or something else entirely, time behaves in a curious way: time slows down due to orbital speed, and time speeds up due to reduced gravity caused by being in orbit rather than on the surface. These effects cancel out at half the planet's radius. Because the velocity component of time dilation is larger than the effect of reduced gravity, astronauts in low orbit on the International Space Station age slightly more slowly than people on Earth's surface. The clocks on GPS satellites in high orbit run faster than those on Earth's surface due to the fact that orbital speed is not the only factor affecting clock speed; these satellites must slow down their clocks to correspond with surface time.

Everett Abrams · Answer

undefined The perception of time differs between Earth and space because of special relativity and general relativity. Special relativity states that time can move differently for observers who are moving relative to each other, while general relativity adds gravity to the equation. As a result, variables like relative motion and gravitational fields in space can affect how time appears in space.