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 Probe the light beam coming out of the same circle, but is rescued by the others before he is frozen completely. Dexter stays behind while the others begin to explore the inside of the probe. Jefferson Rome and the others discover a room with an alien telemetry system. The probe is drawing up seawater. Jefferson Rome remembers the space probe Surveyor, used to study other nearby planets such as Venus, Mars and Jupiter. The three survivors themselves are being held captive in antiseptic chambers, where they are prey to some strange mutant microbes. Such a mutant microbe, larger than a person,