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Originally posted by fleabit
I'd be absolutely stunned if any camera phone were ever able to take pictures of nebulas. I don't think that's it, honestly.
Aurorae are more frequent within an oval about 2,500 kilometers wide centered on the North Magnetic Pole (located in Northern Canada) and within an oval about 2,500 kilometers wide centered on the South Magnetic Pole (located in the ocean near Antarctica). This means the Aurorae Borealis is most commonly seen from Alaska, Canada, Greenland and Iceland. It can be seen, but less frequently from the northern continental United States, Scandinavia, Ireland and the United Kingdom. On rare occasions, aurora have been seen even further from the north magnetic pole. The Aurorae Australis is rarely seen since there are no populated areas near the South Magnetic Pole.
Aurora are more common at solar maximum (which occurs every 11 years). Aurora can be relatively common up to 3 years after the solar maximum. Scientists have been somewhat successful (but not perfect) at predicting when aurorae will occur.
Aurorae can appear in several different shapes, but the most common shapes have been described as sheets, curtains and streamers. They can appear in different colors (green is the most common, however red, violet and blue have been observed). Under unusual conditions, aurora can appear to pulse on and off over a large section of the sky (the author has observed this only once). Aurorae observing does not require dark skies, but colors and pulsation are subtle phenomena which are easier to observe if you are dark adapted and observing from a dark site.