In archaeology, space archaeology is the research-based study of various human-made items found in space, their interpretation as clues to the adventures humanity has experienced in space, and their preservation as cultural heritage.

It includes launch complexes on Earth, orbital debris, satellites, and objects and structures on other celestial bodies such as the Moon and Mars. It also includes the applied field of cultural resource which evaluates the significance of space sites and objects in terms of national and international preservation laws. Cultural resource looks at what, how and why these artifacts of our recent history should be preserved for future generations.

Space tourism could affect archaeological artifacts, for example, on the Moon. The notion that cultural heritage is at stake and requires action to prevent deterioration or destruction is gaining ground. Perhaps artifacts (say, antiquated space stations) could be preserved in "museum orbit". Many such artifacts have been lost because they were not recognized and assessed. Experts assert that continuity and connection to the past are vital elements of survival in the modern world. A model has been suggested for international cooperation based upon the management of Antarctica. Implications for cooperation interest anthropologists as well.

An unexpected ramification of this work is the development of techniques for detecting signs of life or technology on other planets, or extraterrestrial visitation on Earth. One facet of this work is the use of satellites for identifying structures of archeological significance.

In January 2025, the World Monuments Fund announced that it had added the Moon to its World Monuments Watch, due to its cultural significance to humanity, the achievements of the Apollo and other lunar landings, and the increase in public and commercial spaceflight. This was the first time that heritage located off of the Earth was recognized by the Watch. The ensemble of cultural heritage associated with the Moon was nominated for the Watch by the ICOMOS Aerospace Heritage International Scientific Committee (founded in 2023).

Satellites are key artifacts in examining human encounters with space over time and the effect we leave through artificial objects. This list includes:

The complexities and ambiguities of international legal structures to deal with these sites as cultural resources leave them vulnerable to impacts in the near future by many varieties of space travel. An outline of the legal situation was made by Harrison Schmitt and Neil Armstrong, two astronauts who walked on the Moon as part of the Apollo program. The governing law on the Moon and other celestial bodies is the Outer Space Treaty of 1967 based upon guidelines from experience in the Antarctic. Another source of ideas is the Law of the Sea. The Outer Space Treaty contains language stating that space objects remain under the jurisdiction of the originating state, and the civil and criminal laws of that state govern private parties both on the Moon and "events leading up to such activity". State parties are to inform the public about the nature and result of their activities.

The later Moon Agreement of 1979 was signed but not ratified by many spacefaring nations. Schmitt and Armstrong believe this lack of ratification relates to disagreement over wording such as "the Moon and its natural resources are the common heritage of mankind", which is taken as possibly excluding private activity, and objections to wording concerning the disruption of the existing environment.^{[citation needed]}