How many colors can one see in this photograph of the aurora borealis in Alaska? Green, pink, yellow, orange, and purple colors dance across the horizon in a swirling display of beauty. The lights provide an astronomer's delight in the inky sky.
If there weren't any clouds, and you had a strong solar storm, how far south could you see the aurora? Would anything else go wrong? (Many things would go wrong.)
By Jillian Scudder, Contributor. Forbes. Sat, 14 Jan 2017 13:11:00 -0500.