What causes the midnight sun? Scientifically speaking, the midnight sun occurs when the Earth's axis is tilted more towards the sun, peaking during the summer solstices. If you're in the Northern Hemisphere, that's usually around 21 June each year. In the Southern Hemisphere, it's around 23 December.

Why does polar night occur?

The polar night is caused by the rotation of the earth in relation to the position of the sun. The earth rotates on a titled axis of around 23.5 degrees. As a result of this axial tilt, there are periods of the year where the Arctic Circle and the Antarctic Circle are either completely exposed or obscured from the sun.

Why midnight sun took so long?

The real reason the book took so long to write is because this was just a huge, pain-in-the-butt book to write. With some of my books, it was like they were writing themselves, and I was just working to keep up with dictation. That kind of writing is fun and exciting. This was like, every single word was a struggle.