Antarctic light. What phenomenon does Polaris belong to?

Aurora is most likely to appear before the vernal equinox and autumnal equinox, and it appears more frequently in spring and autumn than in Xia Dong. However, according to the data of NASA's "THEMIS" mission in 2007, the earth's position intersects with the "magnetic cable" most during the vernal equinox and autumn equinox, and this result is not due to the alternation of four seasons. [1] In addition, when there are many sunspots, the frequency of aurora is also large.

According to the new data sent back by the National Aeronautics and Space Administration "The Mismission" (2007/12), scientists found that charged particles released by the sun flew to the earth like airflow, and when they hit the magnetic field over the North Pole, they formed several distorted magnetic fields. The energy of charged particles is released in an instant in the form of bright and dazzling northern lights, while the aurora of the earth is mainly red and green because.

The research was conducted by Angie Polos of UCLA, and the results were presented at the academic meeting of American Geophysical Union on February 9, 2007.

In February 2007, five satellite groups of the Smithsonian mission were successfully launched. In March, the Northern Lights appeared over Alaska and Canada for two hours. At the same time, the satellite also detected the contact between charged particles and the North Pole magnetic field. To Angelopoulos' surprise, the magnetic storm formed by the contact of charged particles with the magnetic field swept the air at a speed of 650 kilometers per minute, and its power was equivalent to an earthquake measuring 5.5 on the Richter scale.

Scientists have long suspected that the energy of the Northern Lights comes from the distorted magnetic field generated by the contact between charged particles and the Arctic magnetic field, but this theory was not confirmed until May this year, when the satellite group of the Semis mission first measured the structure of the distorted magnetic field from more than 60,000 kilometers above the Earth.

Aurora is a large-scale discharge process around the earth. Charged particles from the sun arrive near the earth, and the earth's magnetic field forces some of them to concentrate along the magnetic field lines to the North and South poles. When they enter the polar upper atmosphere, they collide and excite with atoms and molecules in the atmosphere, producing light and forming aurora.

Aurora not only appears on the earth, but also on other planets with magnetic fields in the solar system.

The aurora observed in the northern hemisphere is called the Northern Lights, and the aurora observed in the southern hemisphere is called the Southern Lights. Some China scholars think Shan Hai Jing? 6? 1 The "touching the dragon" in the Wild Classic refers to the aurora. "The snake's face is red. It is thousands of miles long. It is also the god of Zhongshan. " . Some scientists have also discovered the aurora on Mars and Jupiter [2].