It was amazing to line up the sunset with Fair Isle from the ferry. In fact, the sun set 3 times: it disappeared then the relative movement of boat and sun lined up the very top of the sun with a lower gap on the island so it could disappear again!
Focusing on the droplets on the outside of the window gave a lovely example of scattering. Light from the sun hits the droplets and then is re-emitted to my eye. This is like what happens with the atoms in the high atmosphere. Rays of light from the sun that are not coming in my direction are absorbed and then re-emitted back in my direction.
