TRANSIT OF MERCURY
Mercury will cross the disc of the Sun on Monday 9th May 2016 between 12:12 and 19:42 BST.
If you missed the last Transit of Venus this is the next best thing!
We will be observing from the Gun Platform at the Redoubt Fortress from 12 noon til 5pm, with Hydrogen Alpha and White Light filters and by projection.
WARNING: NEVER look directly at the Sun without appropriate filters in place.