Fascinating night and day facts. Our seasons happen because of the way the Earth is tilted.. The Earth takes 365 days (one year) to travel in an orbit the Sun.. In Svalbard, Norway, which is north ...

Summer gets its official start in the Northern Hemisphere with the arrival of the summer solstice. The sun will trace its ...

The official marker of the summer season arrives tonight. It's the summer solstice, which has been celebrated for thousands of years.