It has become a great challenge today to try to understand the universe around us. So far, we have gathered many ideas to the mysteries in our world, particularly on how planets orbit the Sun, why an apple falls from a branch to the ground and not moving upward, why the sky appears blue or the rising Sun looks red. The quest to solve all the secrets of the universe is definitely a very difficult challenge. Now that astronomers have directly got the existence of gravitational waves, ripples through space time itself, the last bit of Einstein's theory of general relativity has clicked into...