Here's why:
* The Aurora Borealis is caused by charged particles from the sun interacting with the Earth's atmosphere. This interaction requires darkness for the light emitted by the aurora to be visible.
* During summer in the northern hemisphere (when the aurora borealis is visible), there is 24-hour daylight. This means there is no darkness for the aurora to be seen, even though solar activity is still happening.
While you can't see the aurora borealis in summer, you can still see it in the winter months, when there are long periods of darkness. The best time to see the aurora borealis is during the winter solstice, when there is the longest period of darkness.
