It must be remembered that Galileo invented the non inverting telescope, all older designs produced an inverted image.
This is surely a crucial element in adding credibility to what was observed through the telescope.
If Galileo had shown people an inverted image of the moon, along with the craters, they would never have believed that what they were seeing was a real image and not an illusion.
And so they would have claimed that Jupiter’s moons were an optical trick as well.
It must be remembered that Galileo invented the non inverting telescope, all older designs produced an inverted image.
This is surely a crucial element in adding credibility to what was observed through the telescope.
If Galileo had shown people an inverted image of the moon, along with the craters, they would never have believed that what they were seeing was a real image and not an illusion.
And so they would have claimed that Jupiter’s moons were an optical trick as well.