Fall officially starts in just a few days. Here is everything to know about the last day of summer, what an equinox is and why it's so important.

The equinox occurs at the same moment wherever you are on Earth but what is it and when does it take place? Chris Fawkes has ...

This Sunday, a partial solar eclipse is taking place just hours before the September equinox flips Earth's seasons. Here's where a few lucky humans will be able to see it.

Fall is one of the perfect seasons. It's not too cold. It's not too hot, and it doesn't have all the allergies associated with spring. You have football and crisp nights for sitting around the fire ...

Fall is one of the perfect seasons. It's not too cold. It's not too hot, and it doesn't have all the allergies associated with spring. You have football and crisp nights for sitting around the fire ...

According to scientists (yes, those people), summer ends on September 22 or thereabouts, when the sun crosses the celestial ...

Earth’s orbit around the Sun isn’t a perfect circle—it’s slightly elliptical. Each year, around July 2 or 3, Earth reaches its farthest point from the Sun, known as aphelion. Around January 2 or 3, ...