Is it possible to observe just one of the four Galilean (or Jovian) satellites without telescopes or binoculars? I would say: yes, when the bright orb of Jupiter and three of its Galilean satellites are hidden behind the corner of a large building. Perhaps interesting to make photographs of such appearances.
A lunar occultation of Jupiter and its satellites (at the moon's nocturnal limb) is a rather quick happening to perform the above described experiment. The corner of a large (unilluminated) building could be used to create a "continuous" occultation. One has to "shift" the head a little bit to the right or to the left to see the bright Jupiter or just one of its satellites.
A lunar occultation of Jupiter and its satellites (at the moon's nocturnal limb) is a rather quick happening to perform the above described experiment. The corner of a large (unilluminated) building could be used to create a "continuous" occultation. One has to "shift" the head a little bit to the right or to the left to see the bright Jupiter or just one of its satellites.