The northern lights, one of several astronomical phenomena called polar lights (aurora polaris), are shafts or curtains of colored light visible on occasion in the night sky.
The origin of the aurora begins on the surface of the sun when solar activity ejects a cloud of gas. Scientists call this a coronal mass ejection (CME). If one of these reaches earth, taking about 2 to 3 days, it collides with the Earth magnetic field. This field is invisible, and if you could see its shape, it would make Earth look like a comet with a long magnetic ail stretching a million miles behind Earth in the opposite direction of the sun.
When a coronal mass ejection collides with the magnetic field, it causes complex changes to happen to the magnetic tail region. These changes generate currents of charged particles, which then flow along lines of magnetic force into the Polar Regions. These particles are boosted in energy in Earth upper atmosphere, and when they collide with oxygen and nitrogen
atoms, they produce dazzling auroral light .
When the Northern lights start to shine, this is the moment that love come out~.THINK ABOUT enjoy the miracle whith your lover and carve the moment in your mind and keep it for lifetime. Maybe it is the PERFECT Moment for propose !
POSTED BY WENJIA ZHANG
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