This case study shows how the Burra Charter (2013) significance criteria can be applied to a heritage feature on the Moon, the astronaut bootprints which are part of the Apollo 11 site. The bootprints are one of the most well-known human traces and have been the focus of recent campaigns for greater recognition of lunar heritage.
Historic significance: high.
The bootprints are associated with a unique event, the first human expedition to another world; with the astronauts Neil Armstrong and Buzz Aldrin, who are rightly celebrated for this achievement; and with the historical processes of the Cold War ‘space race’ and early years of space exploration. The prints are the first human trace fossils outside Earth.
Scientific significance: high
The astronaut boot soles were an experiment in themselves: the bands were designed to convey information about regolith depth and reflectance. This is partially why so many photographs of the bootprints were taken. Further research could use them to assess and better understand surface processes and regolith behaviour. Their placement shows where the astronauts walked over their two and half hours on the surface, and hence define the limits of the site. Images show that the prints are layered or superimposed, which enables a time sequence of activities to be derived. Their depth and angle indicate something about the gait adopted by the crew to maintain an upright posture in hypogravity, as well as the depth of lunar dust over the local area.
A major research potential of the prints is a comparison of the six landing sites, over which the duration of surface became progressively longer, and the succeeding crews had the benefit of learning from the preceding ones (Gorman 2016). As a recent geological disturbance to the regolith, the sharp ridges of the prints create a baseline to assess natural erosion processes on the Moon such as micrometeorite impacts and dust levitation. The mechanics of the bootprints could also be usefully be compared to robotic and rover traces (Gorman 2016).
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| Image courtesy of NASA |
The geometric, banded appearance of the trace fossils is demonstrably unlike any other geological features on the lunar surface. The prints are 35.5 cm x 16 cm in size. The rectilinearity and regularity of the imprints are a stark contrast to the predominant circular patterns created by bombardment craters and the irregular shadows and textures of rocks. The contrast between light and dark in the ridges is a distinct and unique pattern in the lunar environment.
Social significance: high
The first footprint of Neil Armstrong has become a 20th century icon, reproduced in countless formats and instantly recognisable. Although the Apollo missions were political in nature and opposed by various sectors of society, the overriding social meaning of the bootprint is human ingenuity and courage. Its creation was watched by millions of people across the world and hence has a resonance far outside the space community. The bootprints are associated with Armstrong’s famous first lines about ‘one small step’, a phrase which has become incorporated in popular culture, advertising and literature.
Spiritual significance: low
While an argument for spiritual value is not as obvious as social value, the reverence in which the bootprints are held is equivalent to a secular belief relating to humanity’s place in the universe. The bootprints have contributed to the conviction, strongly held by some groups, that the Apollo landings were a hoax (Link 2021). They have also been used by scholars of religion to explore concepts of faith and divinity (eg Gordon 2019, Stavrakopoulou 2022).
This is an excerpt from a document prepared for the Global Expert Group on Sustainable Lunar Activity (GEGSLA). The full document can be downloaded here.
References
Gordon, Chris 2019 Footprints on the moon: a story of faith and Faith. 19 July, Catholic Voice https://www.catholicvoice.org.au/footprints-on-the-moon-a-story-of-faith-and-faith/
Gorman, A.C. 2016 Culture on the Moon: bodies in time and space. Archaeologies 12(1): 110-128.
Link, Devon 2021 Fact check: Moon landing conspiracy theory misrepresents lunar footprint. September 17, USA Today. https://www.usatoday.com/story/news/factcheck/2021/09/17/fact-check-moon-landing-conspiracy-theory-misrepresents-footprint/8380230002/
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