I personally am not a great fan of the complex astronomy idea but try looking at a book called 'Stonehenge; Science and Society' published last year which has a good article about astronomy.

Stonehenge is one of the world’s most famous monuments. It stands on Salisbury Plain, in Wiltshire, and its giant stones can be seen from miles around. It took a huge effort to build Stonehenge ...

Was Stonehenge used to predict eclipses? Previous claims have assumed a high degree of sophistication on the part of the builders of Stonehenge, and that the number of Aubrey holes (56 ...

This claim gained popularity thanks to Erich von Däniken’s 1968 book Chariots of the Gods?, which claimed numerous monuments, ...