Shields Up Protect Spaceship Earth from
Solar Storms
Our
planet has its own protective shields and I had no idea. Our planet doesn't just sit there and take whatever solar wind gives it, instead it fights back!
The Earth can and does bring up a plasma shield to protect itself! Most solar
wind, streams of high energy particles flowing from the sun, is blocked by a
bubble of magnetism called the magnetosphere that surrounds our planet. When
the sun’s magnetic field lines up with our magnetic field, however, cracks
appear in the magnetosphere and charged particles get in. These result in
auroras and geomagnetic storms that mess with navigation systems and power
grids. The Earth’s magnetic field also traps gases as they escape from the
upper atmosphere and when those gases are ionized by the ultraviolet rays of
the sun plasma forms. This plasma is what makes up the plasmasphere and the
plasmasphere is another shield that can send plumes to create a buffer zone
that makes it harder for the Earth and sun’s magnetic fields to line up and
reconnect, hence keeping solar storms from slamming us. NASA’s THEMIS
spacecraft (3 of them) that study solar storms monitored one of these plumes so
even though we don’t know when they’re likely to form, we have evidence that
they do. So next time danger appears on our planet’s horizon, I guess, it’s
time for, “Shields up, Sulu!”
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