On Monday morning, May 9th, Mercury will pass directly between Earth and the sun, producing a rare transit visible from the Americas, Europe, Africa and much of Asia. According to NASA, this is what the tiny black disk of the innermost planet will look like as it crosses the solar disk. In the USA, the transit begins around 7:15 am eastern time. This means it begins before sunrise on the west coast, but that's no problem. The transit lasts for more than 7 hours, so Mercury will still be gliding across the solar disk when the sun comes up over places like California and Alaska. Everyone in the USA can experience the event.