![]() When appropriate for the time window of the visualization, the Voyager flyby trajectories are indicated. Major satellites of the planetary system are also included. The semi-transparent grey mesh in the distance represents the boundary of the magnetosphere.It is part of the 3-D axis glyph (red, green, and blue arrows) included to make the planetary rotation more apparent. The Blue arrow represents the north rotation axis.The arrow indicates the NORTH magnetic pole (convention has field lines moving north to south as the north pole of bar magnet (and compass pointer) points to the south magnetic pole). The Cyan arrow represents the magnetic axis, usually tilted relative to the rotation axis.The magnetotail is pointed in the opposite direction. The Yellow arrow points towards the sun.Some additional glyphs are provided to indicate some key directions in the field model. ![]() These effects combine to not only give Uranus a more a more variable magnetosphere, but suggest the planet's magnetic field may be generated by a different mechanism than that of Earth, Jupiter and Saturn.įor these visualizations, the magnetic field structure is represented by gold/copper lines. In addition, the magnetic axis has a large tilt relative to the rotation axis. The rotation axis of Uranus is tilted over ninety degrees relative to the revolution axis of the solar system, placing it roughly in the plane of the solar system. In these visualizations, we present simplified models of these planetary magnetospheres, designed to illustrate their scale, and basic features of their structure and impacts of the magnetic axes offset from the planetary rotation axes. The Voyagers provided some of the first detailed measurments of the strength, extent and diversity of the magnetospheres of the outer planets. They became the implementation of the 'Grand Tour' of the outer planets originally proposed in the late 1960s. The Voyager program, two spacecraft launched in 1977, and successors to the Pioneer 10 and 11 missions, completed flybys of the giant outer planets. But it wasn't until the Space Age, when we sent the first probes to other planets, that we found clear evidence of their magnetic fields (though there were hints of a magnetic field for Jupiter in the 1950s, due to observations from radio telescopes). The term 'magnetosphere' was applied to magnetic bubble by Thomas Gold in 1959. That this field might form a type of 'bubble' around Earth was hypothesized by Sidney Chapman and Vincent Ferraro in the 1930s. Some of the earliest hints of this interaction go back to the 1850s with the work of Richard Carrington, and in the early 1900s with the work of Kristian Birkeland and Carl Stormer. Earth's magnetic field creates a 'bubble' around Earth that helps protect our planet from some of the more harmful effects of energetic particles streaming out from the sun in the solar wind.
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