evidenza?
ancora una volta?
un po' di modestia ogni tanto?
...
per le analisi tecniche, aspetto come sempre il giudizio degli esperti

Astrophysicist Dr. Iosif Samuilovich Shklovsky calculated the orbital motion of Martian satellite Phobos ...
....

During an interview about the peculiarities surrounding Phobos, Shklovsky said, “In order to make this braking action so significant, and taking into account the extremely rarefied Martian atmosphere at this altitude, Phobos should have very small mass, that is, very low average density, approximately one thousand times smaller than the density of water.”

...

We must assume that Phobos is a hollow, empty body, resembling an empty tin can.”
....