Was Aristarchos' method to compute Earth-Sun distance ever rediscovered in medieval or modern times?
Ancient Greek astronomer Aristarchos who lived around 300 BC found a method to compute the Eart-Sun distance by applying geometry. In this video about the cosmic distance ladder, at 26:30, Terence ...
How did the radiative flux of each gas giant planet change with respect to time (since their formation)?
We know that each gas giant planet was warmest when it was young. This warmth came from internal heating from both radioactive decay and from gravitational potential energy. This warmth, in turn, ...
Does the lunar orbit plane rotate (8 year period precession)? Does Celestia take this into account while drawing the moon orbit?