Saturday, March 5, 2016

May 9th Transit of Mercury

On May 9th the planet Mercury will transit the sun. The last time we could observe this was in 2006 but this was not visible in Belgium. From Earth only Venus and Mercury can transit the sun as they are closer to the sun then Earth. These transits are rare and with Mercury this only happens about 13 times per 100 year.
For Belgium and the rest of Western Europe the transit is seen from begin (ingress) till end (egress). Timing is set below - be aware this is UTC which means for the region Time=UTC+2h and these are depending of the location of the observer - changes up to a couple of minutes.


Never look at the sun with the naked eye!! Use special sun filters or use projection methods to observe the transit. Below figure shows how Mercury will move across the sun.