Sky calendar

The coming solstices, equinoxes and the days half way between them, with the monuments said to face each sunrise or sunset, the time the sun rises or sets there and how to see it. Each alignment is a claim with its sources quoted; disputed ones give both views. Directions and times are over each site's skyline, from a terrain model of the bare ground (trees and buildings are not in it). Stonehenge in 3D shows the sun, moon and stars over the stones, now and as built, for any date.