About the model
As it is now: every surviving stone from Anthony Johnson's numbered plan of the stones as they survive, with the height recorded for each standing stone; lintels still in place sit on their uprights; the Heel Stone leans as it does. As built: the sarsen circle of 30 uprights and 30 curved lintels, the five trilithons (stones 55 and 59 set where the horseshoe's symmetry puts them; the surviving pairs agree with it within half a metre), the bluestone circle and horseshoe filled in at the spacing of the stones that survive, the Altar Stone standing on the axis (its first position is not known), the Slaughter Stone and the Heel Stone upright with its lost companion, and the four Station Stones. "Mark lost stones" draws the lost ones pale: they are placed where they are thought to have stood; the bluestones are shown in their last arrangement (c. 2400–2200 BC).
By stage: the five stages of Darvill, Marshall, Parker Pearson and Wainwright (2012), each shown under the sky of a year within it. Stage 1 (c. 3000 BC): the ditch and bank fresh and white, the bank about 1.9 m high, with the north-east and south entrances, and the 56 Aubrey Holes, holding bluestones, timber posts or nothing (choose: both views are argued). Stage 2: the sarsens, and the bluestones in pairs in the Q and R holes, the double arc known in the north-east half. Stage 3: the Avenue's banks and ditches, a small bluestone circle inside the horseshoe (its size a guess). Stage 4: the bluestone circle and oval of the completed model. Stage 5: the Y and Z holes, left open. The ditch is placed where the LiDAR shows it today (107.7 m across its middle); the Aubrey Holes on a 43.2 m circle round the same centre, turned onto the seven holes marked on the ground today (within 0.7 m). The entrances' directions are read off a schematic plan; other details (post heights, the Q and R settings' exact places, the outer bank's size) are not published online and are drawn as stated in each stage's sources.
Click a stone for its record and the sources quoted for it. The ground is the Environment Agency's 1 m LiDAR survey (the henge bank and ditch, the Avenue's banks and the barrows show in it); beyond it the land rises to the real skyline, so the sun and moon rise and set where they would. Sun, moon and stars are placed for the date and time chosen (local solar time; years before AD 1582 in the Gregorian calendar extended back). The moon before about 500 BC is uncertain by up to half a degree, since the earth's rotation then (ΔT) is known only to about an hour. Planets are not shown.