6. Conclusion

Einstein proposed the theory of Special Relativity and General Relativity. It states that space and time are really aspects of same thing : Space-time. Space-time is like a flat surface and when it is curved it may be possible to create a wormhole that connects one part of space-time to another allowing us to go forward and backward in time.

Example for Time Dilation

According to this, time moves differently to different people corresponding to their relative speed. A fast moving observer measure time passing more slowly than a stationary observer would. Then this phenomenon is called time dilation. Time travel used to be thought of as just science fiction, but Einstein's general relativity theory allows for the possibility that we could wrap space-time so much that you could go off in a rocket and return before you set out.

Supernova Explosion

Galactic Nuclei

Relativistic physics is necessary to fully understand the most energetic phenomena in the universe from the supernova explosions of stars to the driving force that makes some active galactic nuclei into the brightest objects in the universe.