Space junk is a precious treasure trove to some archaeologists

Date:
Sun, 30 Jul 2023 17:00:00 +0000

Description:
Astronaut Buzz Aldrin looks back on Tranquility Base after the Apollo 11 moon landing. NASA Artifacts scattered across the solar system can reflect its changes over time. The post Space junk is a precious treasure trove to some archaeologists appeared first on Popular Science .

FULL STORY ====================================================================== Astronaut Buzz Aldrin looks back on Tranquility Base after the Apollo 11 moon landing. NASA

Terms like cultural heritage and archaeology might conjure Indiana Jones -lie scenes of old and ancient things buried under the sands of time. But even
now, each one of us is producing material that could interest future humans trying to record and study our own era.

For those who believe that space exploration and astronauts first departures from Earth are culturally significant, then there is a wealth of objects that spacefarerscrewed and uncrewed, past and presenthave left in the realms
beyond our atmosphere.

This stuff is an extension of our species migration, beginning in Africa and extending to the solar system, says Justin Holcomb , an archaeologist with
the Kansas Geological Survey. I argue that a piece of a lander is the exact same thing as a piece of a stone tool in Africa.

This idea is the heart of what Holcomb and his colleagues call planetary geoarchaeology. In a paper published in the journal Geoarchaeology on July
21, these space archaeologists detail how they want to study the interactions between the items weve left around the solar system and the hostile environments they now occupy. This research, the authors believe, will only become more important as human activity on the moon is set to blossom in the decades to come.

The idea of documenting and preserving what we leave behind in space isnt a completely new concept. In the early 2000s, New Mexico State University anthropologist Beth OLeary (who co-authored the paper with Holcomb) cataloged objects scattered around Tranquility Base , Apollo 11s landing site on the moon. OLeary later helped get some of those artifacts registered in
California and New Mexico as culturally significant properties .

I would argue that Tranquility Base could easily be considered the most important archaeological site that exists, says Justin St. P. Walsh , an archaeologist at Chapman University in California who was not involved with the new paper. The bases lunar soil cant be declared a cultural heritage site because that would violate the 1967 Outer Space Treaty , which prevents any country from claiming the soil of the moon or another world. But scholars can still list objects found there as heritage.

Naturally, OLearys catalog includes the remnants of Apollo 11s lunar module and its famed US flag, along with empty food bags, utensils, hygiene equipment, and wires. What is space junk to some is precious culture to space archaeologists. Even long-festering astronaut poop has its valuethats human DNA, Holcomb says.

Archaeological sites on Earth are deeply impacted by the processes of the world around them, both natural and artificial. Likewise, Tranquility Base doesnt just sit in tranquility. The moons surface is constantly bombarded by cosmic rays and micrometeoroids; even faraway human landings can kick up regolith showers .

[Related: Want to learn something about space? Crash into it. ]

Holcomb and his colleagues want to study the various states objects are left in to learn how sites on the moon and other worlds change over timeand how to preserve them for our distant descendants. We think in deep time scales, says Holcomb. Were not thinking in just the next five years. Were thinking in a thousand years.

That sort of research, the authors say, is still quite new. Holcomb, for instance, wants to study what happens to NASAs Spirit rover on Mars as a sand dune washes over it. Other planetary geoarchaeology projects might focus on what the moons environment has wrought upon artificial materials weve left on the lunar surface.

We can find out more about what happened to [castoffs] in the length of time theyve been there, says Alice Gorman , an archaeologist at Flinders
University in Adelaide, Australia, who also wasnt a co-author. The
Opportunity rover now rests in the same Martian sand dunes that it once photographed. NASA officially lost contact with the long-lived robot in 2019. NASA/JPL/Cornell

On Earth, Gorman and colleagues plan to replicate Apollo astronauts boot prints in simulated lunar soil and subject them to forces like rocket
exhaust. Gorman believes even engineers with no interest in archaeology may want to take interest in work like this. These same processes will be happening to any new habitats built on the surface, she says. With the archaeological sites, we get a bit of a longer-term perspective.

The moon is the immediate focus for both this papers authors and other space archaeologists, and its easy to see why. After several decades of occasional uncrewed missions and flybys, NASAs Artemis program promises to spearhead a mass return to the satellites surface. The Artemis program is slated to land on the moons south pole , far away from existing Apollo landing sites. But a flurry of private companies have emerged with the goal of not just touching the moon as Apollo did, but extracting its resources .

Space archaeologists fear that all this future activity will place past sites at risk. We barely know how to operate on the moon, says Walsh.

There are some indications that the broader space community is thinking about the problem. The Artemis Accords (a US-initiated document that aims to
outline the ethical guidelines for the Artemis era) and the Vancouver Recommendations on Space Mining (a 2020 white paper by primarily Canadian academics that proposes a framework for sustainable space mining) express a desire to protect space heritage sites.

Of course, these are only words on nonbinding paper, and space archaeologists do not think they go far enough. Holcomb and colleagues want experts in their field to be involved in planningfor instance, steering scientific and commercial space missions away from spots where they might interfere with existing cultural heritage. There is earthbound precedent for such a role: In many countries, archaeologists already assist infrastructure projects .

We know were going to go there someday, so lets make sure that we have the protections in place before we go and ruin things, says Walsh.

[Related: What an extraterrestrial archaeological dig could tell us about space culture ]

Moves like this cant protect lunar heritage from every possible harm: A
future satellite could very well crash-land on Tranquility Base and wreck the last remnants of Apollo 11 there. But space archaeologists say that it is valuable to take any steps we can.

I think the paper is a really fantastic demonstration of how any mission to the moon has to be about more than just engineering, and it has to be interdisciplinary, Gorman notes. Its very timely that its been published now, while theres still time to incorporate its recommendations into actual lunar missions.

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