And it all starts in the nucleus! (Warning: any discussion of the nucleus excludes prokaryotes. The nucleus is a eukaryotic song and dance number, and don't you forget it.) Most eukaryotic cells have a nucleus throughout their entire life cycles, but there are a few notable exceptions.
The northern lights are strongest when an active area on the sunâs surface faces Earth. Spectacular displays of the northern lights thus occur at roughly 27-day intervals, the time it takes the sun to rotate once. October, February and March are the best months for seeing the aurora borealis.
Share This Story. January 2014 is a big time for hunters in America. Northern Lights hunters, that is. The aurora borealis, known as the Northern Lights, is a naturally occurring light display that illuminates the night sky of several northern countries between September and March every year.