i posted Subselene (1986) because the earlier 1973 proposal to do similar on earth (Subterrene) was also submitted recently, https://news.ycombinator.com/item?

i posted Subselene (1986) because the earlier 1973 proposal to do similar on earth (Subterrene) was also submitted recently, https://news.ycombinator.com/item?id=28559927 https://news.ycombinator.com/item?id=28559927