Clive Ruggles

Astronomical heritage

Portal to the Heritage of Astronomy

Read more on the UNESCO–IAU Portal to the Heritage of Astronomy and about astronomical heritage in general

Free downloads

ICOMOSIAU Thematic Studies on Astronomical Heritage

No. 1 (2010): See here for more information or click here to download a copy directly (46 Mb)

No. 2 (2017): See here for more information or click here to download a copy (19 Mb)


Stonehenge and Ancient Astronomy


Download a copy of the Royal Astronomical Society’s factsheet

Image collection

Leicester University Archive

An archival collection of c. 1100 images of archaeological and archaeoastronomical interest has been available on-line since 1995.



Thousands of new images are (very!) gradually being made available— see here

Stonehenge tunnel consultation

The UK government has announced a new tunnel scheme to remove the A303 trunk road from the landscape immediately to the south of Stonehenge. A major concern from the archaeoastronomical perspective is that the western tunnel portal lies on the solstitial sightline to the SW from Stonehenge. In addition, one of two options for the approach road from the west entails roughly 2 km of open dual-carriageway road running out from the tunnel entrance broadly along the sightline together with a new two-level road junction, also placed within the sightline. This raises serious concerns that the integrity of the SW sightline from Stonehenge could be permanently destroyed, eliminating forever the possibility of visitors to Stonehenge once again seeing the winter solstice sun setting behind the distant natural horizon along the axis of the monument.

The public consultation period ended on March 5. The responses include:

  A response from Commission C4 (World Heritage and Astronomy) of the International Astronomical Union
  A response from the co-authors of the extended case study on Stonehenge on the UNESCO–IAU Portal to the Heritage of Astronomy
  A broader archaeological perspective from 21 “Stonehenge experts”


The Executive Committee of the European Society for Astronomy and Culture (SEAC) have also issued this support letter.


… is the study of beliefs and practices relating to the sky in the past, especially in prehistory, and the uses to which people's know- ledge of the skies was put.


Professional bodies

Free software tools

Basic declination calculator


by Andrew Smith

See the Tools page for more info


Springer Handbook (2014):


Ocarina Books publishes and distributes books relating to archaeo- and ethnoastronomy

Alice Ruggles Trust

If you are looking for things related to Alice and/or information about stalking, please visit the Alice Ruggles Trust website