A photo taken to celebrate the anniversary of the birth of Galilei:
The four major satellites of Jupiter, discovered by Galileo Galilei and Simon Marius and clearly visible from the Earth even through small telescopes, are commonly defined Medici (or Galilean) satellites. They are Io, Europa, Ganymede and Callisto; Ganymede, in particular, is so bright that if it were not close to Jupiter it would be visible even to the naked eye, at night, in the terrestrial sky. Galileo’s first observation of these satellites dates back to 7 January 1610.
After several days of observations, Galileo concluded that the four bodies were in orbit around the planet; the discovery was a solid argument in favor of Nicolaus Copernicus’ heliocentric theory, because it showed that not all objects in the solar system orbited the planet Earth.
This is a statue of Galielo erected in Pisa, his city. I took this photo in 2010 when the statue was built, today I photographed Jupiter and I did the photomontage by placing it in the right position on the celestial vault. The position of Jupiter is exact in the sky in fact in the photo I took on November 11 of 2010 Jupiter was in that position, but the satellites could not be seen well (I am sending you the old shot). Shooting data: EOS 5DMk2 at 640Iso, EF24-70 / 2.8 for the Statue, EF300 / 4 for Jupiter