How does a clock go slower if you travel at high speed?

Einstein said that a clock at high speeds (near the speed of light) is slower than a clock "immobile". It has been shown that a clock returning to earth from an orbiting satellite shows less time than a clock stopped, the land of the surround. Why? Speed is relative. That is, the earth bound clock moving at high speed satellite WRT bound clock, so that it can be considered stationary, and the earth bound clock moving at high speed. So why not the earth bound clock go slowly?

His thought of the twin paradox in special relativity. The problem with the twin paradox is that it does not work with special relativity alone, general relativity needs to function properly. In the twin paradox, one is left in the earth twice and the other flies to a distant star at high speed, turns around, and returns to earth. The Earth twin considers that the dual traveling at high speed and have a slower clock, so when I double back to earth, is younger that the Earth twin. Special relativity ignores the perspective of the traveling twin in the spaceship because the twins are not in an inertial frame. When he turns around, acceleration is a huge, close to the speed of light in one direction at near the speed of light in the other. Special relativity can not deal with acceleration. In general relativity, you can look at the prospect of twin in the spaceship and discover that when he turns back the clock on the twin sees the earth as moving very, very fast, so when you return to earth, just agree that the boat twice is younger. It is similar to the satellites. Accelerated around the Earth and experience less gravity, it affects different point of view and can not be adequately accounted for with special relativity. You need general relativity. In general relativity, different reference frames are not equivalent, because some are more or less inertial. Frames that have the same inertia are equivalent. Others are not.

Coldplay - Clocks

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