How to look directly to the sun

Sometimes a solar eclipse happens and everyone comes and sees it. The problem is you can’t look directly to the sun because you could seriously injure your retina. In this article I am going to show you how to construct an apparatus which requires no lenses, you can do it in 5 minutes and permits you to look and take images of a solar eclipse or even the sun.

The universe expansion

In 1917, Willem the Sitter used the concepts of general relativity from Albert Einstein to explain that a universe without matter would expand for always with non-stop. But what if that ocurred to our universe?

Gravitational Waves Proof

In 1915, Albert Einstein posted a paper explaining general relativity in which he predicted the existance of gravitational waves.  Now this has been proben by two obserbatories in the world.