The Substellar Zoo: From Brown Dwarfs to Super-Earths

I particularly like Frost’s illustration from 1846 which shows how planetary systems were thought to look like in a post-Newtonian universe: in essence, Frost’s universe is filled with copies of the solar system – planets orbit each star. Interestingly, 130 years later the Star Wars universe was not that different: the desert planet Tatooine, the…