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Einstein’s theory of relativity had two main groups: General Relativity and Special theory of relativity, which were both important scientifical improvements along with their theories: Space-time, The speed of light and universal gravitational waves.

Space and time were theorized to be related to each other because for all we know, time has existed as long as space has. The speed of light is always the same speed observed from any direction. Gravitational waves are another part of the space-time theory in that, like on Earth, they occur in space too.

Space Time has always been a difficult concept to grasp, as space relates to here and time relates to now. They are intertwined because they exist with each other and not seperatley. "Where now depends on how fast you are moving".Space have existed as long as time has because they were both created at the same time. They're even more related because the time it takes to go from Point A to Point B is a certin measurement of the speed light which can curve the space time relation the closer you get to the actual speed of light. In the end, it's all related.

Scientists Albert Michelson and Edward Morley invented an ingenious method to track the speed of light. If the device they made was moving at all then technically it should be catching up to the speed of light but no matter what direction they positioned it in or how fast they made it go, the speed of light never changed. “The Struggle Lost, Einstein Pushes Further”. Thus, the speed of light is 670,616,629 miles per hour, or exactly 299,792,458 meters per second, always and never changes no matter which way you look at it.

In space, gravitational waves are just like a paddle hiting the water in that, the tip of the paddle is the Sun, and the waves it makes are revolving planets like the Earth. "Ripples in the Fabric of Space Time". Ptolemy reasoned that, to describe the motion of the Sun and Moon, there existed an epicycle or a secondary cycle centered on another, usually larger circle and that they all moved in one large orbit while objects moved on the circles in the epicycle. "An Ancient Struggle to Exalt the Earth". A more basic concept is that there is no friction or air resistance in space allowing a smaller object that gets caught in the gravitational field of another to orbit it without ever escaping unless another force comes into play.

All of the concepts I have previously stated are all fundamental concepts of both Theories Relativity. Space-Time is an important concept in space along with the gravitational waves in space and the speed of light and how it always travels at one speed. To completly write a large paper on these topics would take a very long time, so, for the mean time, this web page will have to do.

Works Cited

"black-holes.org—Einstein's Theory of Special Relativity." __Simulating eXtreme Spacetimes—A Caltech-Cornell Project__. 5 Feb. 2009 .

Dine, Michael. "Relativity." World Book Online Reference Center. 2004. World Book, Inc. http://www.worldbookonline.com/wb/Article?id=ar464240.