People should not be able to claim territory in space because of a few reasons. One reason is the fundamental principle of "non-appropriation" which "prevents any nation from claiming sovereignty over the Moon or any other celestial body" (theconversation.com). For example, the Moon Agreement provides protection of the Moon with rules relating to potential activities on the Moon (as well as other celestial objects). There is also the Outer Space Treaty which is a "treaty on principles governing the activities of states in the exploration and use of outer space, including the moon and other celestial bodies." (nasa.gov). It includes a few basic principles; the moon and other celestial bodies will only be used for peaceful purposes, outer space shall be free for exploration, the exploration and use of outer space shall be carried out for the benefit and in the interests of all countries, states shall be responsible for national space activities wether carried out by governmental or non-governmental entities, and states shall avoid harmful contamination of space and celestial bodies. (Star Wars will not be happening under this treaty, such a shame.)
Also, I know you commented for me not to talk to you ever again, but the other answers were deleted so I could answer properly. Have a nice day. :)
