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.
Northern Norway is a land of wide open spaces and little light pollution offering superb opportunities for seekers of the northern lights. 1  Board the Hurtigruten for a northern lights cruise. 2  Explore the picturesque Lofoten Islands. 3  Discover the vast open skies of the North Cape. 4  Experience the polar night in Spitsbergen.