![]() ![]() ![]() If one of these reaches earth, taking about 2 to 3 days, it collides with the Earth’s magnetic field. Scientists call this a coronal mass ejection (CME). The origin of the aurora begins on the surface of the sun when solar activity ejects a cloud of gas. Sten Odenwald, author of The 23rd Cycle: learning to live with a stormy star (New York, Columbia University Press, c2001), provides insight into how northern lights are generated: Northern lights are also called by their scientific name, aurora borealis, and southern lights are called aurora australis. Polar lights ( aurora polaris) are a natural phenomenon found in both the northern and southern hemispheres that can be truly awe inspiring. LCDR Gary Barone, NOAA Corps (ret.), photographer. 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. ![]()
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