Three moons and their shadows parade across Jupiter — comparison of beginning and end of sequence, with annotations

These new NASA/ESA Hubble Space Telescope images capture a rare occurrence as three of Jupiter’s largest moons parade across the giant gas planet’s banded face.

The image on the left shows the Hubble observation at the beginning of the event. On the left is the moon Callisto and on the right, Io. The shadows from Europa, which cannot be seen in the image, Callisto and Io are strung out from left to right.

The image on the right shows the end of the event, approximately 42 minutes later. Europa has entered the frame at lower left with slower-moving Callisto above and to the right of it. Meanwhile Io — which orbits significantly closer to Jupiter and so appears to move much more quickly — is approaching the eastern limb of the planet. Whilst Callisto’s shadow seems hardly to have moved Io’s has set over the planet’s eastern edge and Europa’s has risen further in the west.

The movement of the moons is shown in the video created from Hubble stills.

Credit:

NASAESA, Hubble Heritage Team

About the Image

Id:heic1504c
Type:Collage
Release date:5 February 2015, 16:00
Related releases:heic1504
Size:2080 x 1072 px

About the Object

Name:Callisto, Europa, Io, Jupiter
Type:Solar System : Planet : Satellite
Category:Solar System

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BandWavelengthTelescope
Optical
B
395 nm Hubble Space Telescope
WFC3
Optical
V
502 nm Hubble Space Telescope
WFC3
Optical
R
631 nm Hubble Space Telescope
WFC3

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