What is gravitational lensing?

Everyone is already familiar with the real-life applications of gravity. Not only do we feel its effects every day, but also we are provided enough information from mass media. Gravity allows to keep our feet on the ground. Without gravity, we would simply float off into the atmosphere. Gravity is an essential force in the Universe, holding the Earth and all of the planets in place. Our galaxy is made up of hundreds of billions of stars and all of them hold together due to the force of attraction.

One of the most interesting things about gravity is that it operates like a lens, making distant objects appear nearer. Thanks to Albert Einstein’s insight on how gravity works, we now know that the universe isn’t static. On the contrary, it’s fully dynamic. Einstein predicted gravitational lensing, in which massive objects can bend light. Clearly, he was ahead of his time. (more…)