Saturn briefly vanished from view in early 2025, when the Moon passed directly in front of it for observers along a narrow strip of Earth. The event, known as a lunar occultation, was visible from Greenland across central Europe and into northern Africa. One image of it, taken from Sardinia, Italy, combines several exposures into a single scene.
What an occultation is
Saturn did not go anywhere. An occultation happens when one body moves between an observer and a more distant object and hides it. In this case the Moon crossed the line of sight to the ringed planet, so Saturn was blocked from view until the Moon’s motion carried it clear again. Because the Moon is so close to Earth, the path from which such an event is visible is limited, which is why only a small part of the planet had a view this time.
A composite from Sardinia
The image was captured after sunset in Sardinia and is a digital fusion of three separate frames. The first shows Saturn alone, before the Moon covered it. The other two show the Moon at different exposure lengths. Merging them places the planet and the lunar disk in one frame.
A bright point near Saturn in the picture might be mistaken for one of its moons, but it is the star 85 Aquarii. The star lies much farther away than the planet: it is further behind Saturn than Saturn is behind the Moon. The three objects line up in the sky, but they sit at vastly different distances.
When it happens again
The Moon will next pass in front of Saturn, as seen from some location on Earth, in 2031. As with the 2025 event, the visibility zone is expected to be limited to particular regions rather than the whole planet.
Source: science.nasa.gov
