This webcam and telescope
image of banded gas giant Jupiter shows the transit of three shadows cast by
Jupiter's moons in progress, captured in Belgian skies on October 12 at 0528
UT. Such a three shadow transit is a relatively rare event, even for a large
planet with many moons. Visible in the frame are the three Galilean moons
responsible, Callisto at the far left edge, Io closest to Jupiter's disk, and
Europa below and just left of Io. Of their shadows on the sunlit Jovian cloud
tops, Callisto casts the most elongated one near the planet's south polar
region at the bottom. Io's shadow is above and right of Jupiter's Great Red
Spot. Of course viewed from Jupiter's perspective, these shadow crossings could
be seen as solar eclipses, analogous to the Moon's shadow crossing the sunlit
face of planet Earth.
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