How To See Mercury Passing The Sun

Mercury only passes in front of the Sun a few times every century, and the last time was a decade ago. While the celestial event is visible from most of Western Europe and North America on Monday 9 May between 12.12pm BST and 7.42pm BST, catching a glimpse of it is no easy task. The first thing to know is that you should not look directly at the Sun, because it'll injure your eyes.