From a young age, parents consistently told us not to look directly at the sun. Today, on May 9, will occur astronomical event that occurs only 13 times in a century, the planet Mercury will travel between the Earth and the sun.
The spectacular phenomenon like this often encourage amateur astronomers to turn their telescopes to look at this phenomenon. Inevitably, someone will forget how bad idea is to look directly at the sun, whether it is done by a bare eye or a telescope.
That is why Mark Thompson, British astronomer and author, has made a video that reveals what happens when we look directly at the sun.