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 ...

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

The longest day of the year, and the official start of summer, has arrived in the U.S. The summer solstice takes place Friday ...