ESA's Venus Express spacecraft is orbiting close to polar, suitable for devices including a magnetometer and a random particle detector to study the interaction of the solar wind, the ionosphere, and the tail of the magnetosphere. Previous missions, along with Pioneer Venus, techwadia were in periodic orbits or were active during specific periods of the solar pastime, so now they could not detect these reunion events.
On May 15, 2006, Venus Express crossed to the tail of Venus'
magnetosphere when it detected the structure of a rotating magnetic region in
approximately 3 minutes. Calculations based entirely on its length and pace
mean it was about 3,400 km long.
The event, which occurred about five radii from Venus (about
9000 km) down the trail, is considered evidence of a transient plasmoid, a
temporary form of a magnetic loop that forms through magnetic reconnection in
the tail of the magnetosphere. Planetary.
Further studies of the Venus Express magnetic field
recordings revealed many close observations of the energy
exchange between a magnetic object and the plasma within the tail.
The data also shows that Venus's magnetosphere is, in many
ways, a scaled-down version of Earth.
Magnetic reconnections occur in the tail of the Earth's
magnetosphere and plasma layers at a distance of approximately 10-30 planetary
radii below the make money online bottom of the magnetosphere. Since Earth's magnetosphere is 10
times larger, one could predict that reconnection on Venus would occur 1-3
radii below its tail. This is where Venus Express discovered the reconnection
activity.
"Plasmoids are common possibilities within the
magnetospheres of planets, including Earth and Jupiter, but they were not
predicted in the magnetic tail of a non-magnetic planet along with Venus,"
said Tilong Zhang, lead author of the scientific paper. Zhang is Principal
Investigator of the Magnetometer Instrument on Venus Express and Principal
Investigator at the Institute for Space Research in Graz, Austria.
"The reconnection split the tail of the magnetosphere,
causing most of the plasma in the bottom to be ejected into space. As a result, the magnetic
reconnection causes the plasma to move to Venus, similar to what happens in the
tail of the Earth's magnetosphere. It also forms a plasmoid form that travels closer to Venus and directs a chunk of the solar wind's energy into the night environment.
The discovery that plasma is displaced from the tail due to
magnetic reconnections provides a plausible new mechanism for explaining how
and why gases are lost from Venus' upper atmosphere. It is essential to know
how Venus lost its water after the planet began to revel in the runaway
greenhouse effect.
"While understanding atmospheric loss is key to
establishing the evolutionary history of planets, magnetic reconnection remains
poorly understood due to the paucity of in situ observations on planets other
than Earth," said Håkan Swedham, a researcher at the Venus Express
Project. of the ESA. ...
"This final result confirms that commenting on
terrestrial planets using spacecraft in conjunction with Venus Express, Mars
Express, and Cluster is critical if we accept the complex evolution of
atmospheres and planets in vogue."
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