May 9th Transit of Mercury: Everything You Need to Know

On Monday the littlest planet will cross the enormous Sun for viewers in most of the world. Find timetables for your location, a viewing guide, and safe solar observing tips.

Mercury in transit appears tiny, but unlike sunspots, it’s round and has no penumbra. It moves noticeably in 15 minutes, the average time between these exposures taken by Dominique Dierick during the transit of May 7, 2003.
Dominique Dierick

For complete and detailed information on observing this event see:  SkyAndTelescope.com

I will, of course, be photographing this event with my telescope.  Just have to pray the clouds go away!