Eclipses of Jupiter’s moons

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Presentation transcript:

Eclipses of Jupiter’s moons Earth Io Sun Light from eclipse #1 travels this far

Eclipses of Jupiter’s moons Light from the next eclipse has to travel this much farther vE Jupiter Earth Io Sun vEt Measured time between eclipses is longer than actual time by the time it takes light to travel this distance

6 months later Sun Light from eclipse #1 travels this far Jupiter Io Earth Light from eclipse #1 travels this far

6 months + later Measured time between eclipses is Jupiter Io Sun Jupiter Earth vE vEt Light from the next eclipse travels a distance that is this much shorter Measured time between eclipses is shorter than actual time by the time it takes light to travel this distance