The Antarctic and Outer Space Treaties

Aurora australis, Milky Way, and flags at the South Pole (Martin Wolf, NSF)

Sophia Guido recently posted "How the Antarctic Treaty of 1959 Influenced the Outer Space Treaty of 1967" at In Custodia Legis. An excerpt:

After successfully reaching a consensus on the Antarctic Treaty in 1959, countries were eager to apply these already agreed-upon terms to outer space. The result: many articles in both treaties are very similar to each other. For example, during the Antarctic Treaty discussions, many countries wanted to claim part of the continent as their own based on whose citizens discovered a particular area first, but there were many overlaps of land claimed by multiple nations. So, it was decided that no country could claim sovereignty over any part of Antarctica. By putting this article within the outer space treaty, no country can claim ownership over any celestial body in outer space. As more countries develop the technology to send people or objects into space, this idea is more relevant than ever.

One of the main principles of the Outer Space Treaty is that the exploration and use of outer space and the celestial bodies within it should be carried out for the benefit of all countries, regardless of whether it is for scientific or economic purposes, and only for peaceful purposes. Outer space can be freely explored by all states. However, no country can make any territorial claim to any part of outer space or any celestial body, and every country is responsible for any national space activities carried out by their government or non-government entities and will be liable for any damage caused by their citizens. No country is allowed to place any nuclear weapons or any weapons of mass destruction in any part of outer space.