Share The 2019 Transit of Mercury – Mercury Transit The Sun on November 11. Don’t Miss! By Ayda Walsh Mark your calendar: On Monday, Nov 11th, Mercury – the innermost planet of our solar system – will transit the sun (pass directly in front of the sun) on November 11, 2019. The rare transit begins at 12:35 UT (7:35 am EST) and lasts for almost six hours