Time is something we perceive every day. However, it is not just the tick and tock and it certainly is not constant.
Space is often described as three dimensional. It has length, width, and height. But Albert Einstein gives it the fourth dimension. And that is… Time.
For us, time may seem as constant. It is something that is characterized by notions such as the past, present, and future. Just as we can move up, down, left, or right in space, we can move in time.
Einstein taught us that time is an illusion. It’s relative.
“The distinction between the past, present, and future is only a stubbornly persistent illusion.” – Albert Einstein
Einstein’s theory of special relativity says that time slows down or speeds up depending on how fast you move relative to something else. To put it into perspective, if a person was able to move at the speed of light, it would age much slower than the one staying still.
Einstein’s theory of general relativity also showed us that gravity bends time. And that’s when space and time become one. A four-dimensional fabric is called spacetime.
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When an object sits on that piece of fabric it will bend spacetime. Any object distorts the fabric of spacetime and the bigger it is, the greater the effect.
“When forced to summarize the general theory of relativity in one sentence: Time and space and gravitation have no separate existence from matter.” – Albert Einstein
Also, the rotation of a large body twists spacetime.
Our Sun curves spacetime. So the planets orbiting around are not being pulled by the Sun. They are just following the curved spacetime deformation caused by the Sun.
Bottom line: Time is an illusion!