Clive Ruggles


… 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



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

Astronomical heritage

Four new astronomically related properties have been inscribed on the World Heritage List in 2023

They are the Eise Eisinga planetarium, Netherlands; Prehistoric sites of Talayotic Menorca, Spain; Hopewell ceremonial earthworks, Ohio, USA; and Kazan and Engelhardt astronomical observatories, Russian Federation.

For more information see here.

The UNESCO–IAU Astronomy and World Heritage Initiative has really come of age, as all the work put in the decade following the International Year of Astronomy 2009—including the establishment of the Portal to the Heritage of Astronomy and the publication of two ICOMOS–IAU Thematic Studies on astronomical heritage—continues to bear fruit.

A new IUCN report on preserving dark skies

The International Union for the Conservation of Nature (IUCN), through its World Commission on Protected Areas (WCPA), issues a series of Technical Reports that provide tools, specific guidance, and overviews on issues related to protected and conserved areas.

A new report is about to be published that focuses on preserving natural darkness for heritage conservation and night sky appreciation. The IUCN has long recognised the importance of natural darkness to nature conservation, to ecological integrity of protected areas, and to the sustainability of healthy lives in healthy cities.

Entitled “The World at Night”, the new report has been produced by WCPA’s Dark Skies Advisory Group, set up in 2009 to provide advice and guidance in regard to light pollution and dark sky values.

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

ICOMOS–IAU 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)


Astronomical World Heritage


Download a copy of an article published in A&G (Aug 2019 issue)

Stonehenge and Ancient Astronomy


Download a copy of the Royal Astronomical Society’s factsheet

Alice Ruggles Trust

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

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