The interior of the Sun has a density and temperature such as thermonuclear reactions occur, releasing enormous amounts of energy.
Much of this energy is released into space as electromagnetic radiation, mainly in the form of visible light. The Sun also emits a stream of charged particles called the solar wind. This solar wind interacts strongly with the magnetosphere of the planets and moons and helps eject gas and dust outside the solar system.
This wind emerges from the surface layers, and spread in space. Subject to these storms, comets are adorned with a tail showing the direction of the solar wind.
Earth is not completely sheltered by its magnetic shield, the solar wind at a speed of 400 km/s, seeping through cracks polar, to show us beautiful northern and southern lights, with lights white, green and reds.
The Moon as other Solar System objects is also under pressure of the solar wind.
Studies by several probes into lunar orbit revealed the presence of an electric field on our natural satellite.
Deformable Earth's magnetosphere extends about 60,000 kilometers, but it decreases by half when compressed under the pressure of intense solar winds. The magnetic shield prevents partly the solar wind to sweep the earth's atmosphere.
The team of Andrew Poppe of the University of California Berkeley has analyzed data from the Lunar Prospector probe, Kaguya, Chang'e and Chandrayaan, and two satellites of the Artemis mission (Acceleration, Reconnection, Turbulence and Electrodynamics of the Moon's interaction with the Sun).
These probes have discovered a lunar magnetic field on the moon, it would also have its own magnetic shield which extends to 10,000 kilometers above the surface on the side facing the Sun.
The probes have shown the solar plasma is deformed, as if he encountered a shock wave. This shield could result from an electric field that would be formed following the bombardment of the lunar surface by solar ultraviolet light.
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Image: This image of a transit of the Moon across the Sun was achieved February 25, 2007 by Stereo-B probe. © Nasa