Clive Ruggles



This list of books and selected papers and articles contains links and downloadable copies where available.

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

Basic declination calculator

Version v1.0 (3.6.2013)

This calculator uses the same formulae as “GETDEC”, the program referred to in Astronomy in Prehistoric Britain and Ireland (p. 169) and in various publications by myself and others.

The original program, which will only run under older versions of MS Windows, is accessible on this archival page.

deg   min   sec  

deg   min   sec  

deg   min   sec  


Except in discussing putative high-precision lunar phenomena, the apparent declination is sufficient for all archaeoastronomical purposes. While the program quotes results to arc-second precision, a precision of 0.1 degrees (6 arc minutes) is quite sufficient in most contexts.

The program applies a mean refraction correction to the observed altitude and (for geocentric lunar declinations) mean lunar parallax.

See the Astronomy boxes in Astronomy in Prehistoric Britain and Ireland for more information.


… 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