transit
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Occultation of the Galilean satellites occurs when they move behind Jupiter and so become hidden by the planet, as seen from Earth (indicated by O). When a satellite passes in front of Jupiter, a transit occurs (point T).
In astronomy, passage of a smaller object across the visible disc of a larger one. Transits of the inferior planets occur when they pass directly between the Earth and the Sun, and are seen as tiny dark spots against the Sun's disc.
Other forms of transit include the passage of a satellite or its shadow across the disc of Jupiter and the passage of planetary surface features across the central meridian of that planet as seen from Earth. The passage of an object in the sky across the observer's meridian is also known as a transit.
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