Posts

Showing posts with the label Space plasmas

Aurora

Image
"Aurora australis" and "Aurora borealis" redirect here. For other uses, see Aurora (disambiguation), Aurora Australis (disambiguation), and Aurora Borealis (disambiguation). Images of auroras from around the world, including those with rarer red and blue lights Aurora australis from the ISS, 2017. Video of this encounter: [2] An aurora (plural: auroras or aurorae ), [a] sometimes referred to as polar lights , northern lights (aurora borealis) or southern lights (aurora australis), is a natural light display in the Earth's sky, predominantly seen in the high-latitude regions (around the Arctic and Antarctic). Auroras are produced when the magnetosphere is sufficiently disturbed by the solar wind that the trajectories of charged particles in both solar wind and magnetospheric plasma, mainly in the form of electrons and protons, precipitate them into the upper atmosphere (thermosphere/exosphere) due to Earth's magnetic field, where their energy is lost. Th...