So it can be a place, it can be a city of dead type also. So the theoretical studies published by Frontiers in Astronomy and Space Sciences so the basic concept of an asteroid city is based on an idea called onyl cylinder. So it's a rotating space colonially colony designed proposed by Psychist Onil in 1970s. So the rotation creates artificial gravity on the inner rim of the wide ring. So you can remember this cylindrical copper station. You have seen this cylindrical copper like in some movies
And you also told us about the solution of this expensiveness and it will be great if it will apply practically also soon so that in any kind of pandemic that we are expecting in future the human kind, the species of humankind can be saved even like we did not even think even I myself did not think about it like any other solution than Mars and Moon and this will be great. It is really fantastic