Magnetosphere of Jupiter By 1973 the magnetic moment was known within a factor of two, whereas the tilt was correctly estimated at about 10°. The modulation of Jupiter's DAM by Io (the so-called Io-DAM) was discovered in 1964, and allowed Jupiter's rotation period to be precisely determined. The definitive discovery of the Jovian magnetic field occurred in December 1973, when the Pioneer 10 spacecraft flew near the planet. As of 2009 a total of eight spacecraft have flown around Jupiter and all have contributed to the present knowledge of the Jovian magnetosphere. The first space probe to reach Jupiter was Pioneer 10 in
The Jupiter Theft The Jupiter Theft The Jupiter Theft is a 1977 novel by science fiction writer Donald Moffitt, re-printed in 2003 with a new afterword. The initial part of the novel mixes near-future thriller and disaster novel scenarios, focussing on the discovery of a moving gamma-ray source headed towards Earth from the direction of Cygnus X-1, and the diversion of a Chinese-American Jupiter mission to investigate the new Solar System intruder. As the Chinese and Americans are mutually antagonistic politically, espionage and suspicion must be overcome for the Jupiter Mission to go ahead. Once the Mission intercepts the intruder the story shifts