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According to an article by the Space Review.com, “The terrestrial definition of “colony” is not identical to the activity of settling a celestial body, including Mars. This may lead to many in the space advocacy and settlement community to suggest the terrestrial definition of “colony” is inapplicable. Yet, given the nature of international space law, the fundamental legal nature of a terrestrial colony is germane to the private creation of settlements on celestial bodies”. This quote successfully questions the inevitable while talking about space exploration: colonisation of other planets by humans.

Therefore, we can wonder what kind or legal and, more importantly, ethical problems such “colonisation” causes: are humans thinking of colonisation for the “good reasons” or is it just an escape for the wealthiest in case humans cannot survive under the deteriorated conditions of planet earth suffering or climate change (see the quote by Elon Musk below)? And is space colonisation even economically profitable?

« SpaceX founder Elon Musk, for example, has said that becoming an interplanetary species is the only way for humanity to avoid an eventual extinction event on Earth, and that he wants to “die on Mars, just not on impact”. Planetary Resources, a US-based asteroid-mining company, states that its vision is to extend the economy into space » (in Nature.com).