Friday, January 11, 2008

By Jove


Jupiter Aurora

An electric hue aurora glows on Jupiter, 500 million miles from Earth. Produced by electric currents generated by the planet's satellites, these emissions flow along Jupiter's magnetic field. Auroral footprints can be seen from three of Jupiter's moons: Io (far left), Ganymede (just below and to the right of center), and Europa (to the right of Ganymede's signature).

Courtesy of NASA/ESA and John Clarke (Univ. of Michigan).

Dear Jim,

I hope you rec'd my previous mailing -- can't call it a letter. Not much new to report here, except that Lilly and Ann are back in school, and I have a lot of writing to do this month.


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