The spectacular reappearance of the aurora borealis at the beginning of the 18th century, often observed simultaneously from different observatories in Europe,

Just over one hundred years ago Kristian Birkeland looked into the night sky of his native Norway and saw in the beautiful Northern Lights a mystery waiting to

Discover the incomparable beauty of the Northern Lights with this accessible guide for aspiring astronomers and seasoned night sky observers. Covers the essenti