Ancient symbols carved into stones at a site in Turkey suggest that a swarm of comets smashed into Earth 13,000 years ago – triggering an ice age. Scientists believe that the site may have been ...

Earth's distance from the sun does not stay the same throughout the year. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. An astronomical ...

Ancient stone carvings confirm that a comet struck the Earth around 11,000BC, a devastating event which wiped out woolly mammoths and sparked the rise of civilisations.

The Earth is tilted 23.5 degrees on its axis of rotation, and how the North Pole is oriented toward or away from the sun determines two of these astronomical dates.

Seasons are defined in two ways: astronomical seasons, which are based on Earth’s position as it rotates around the sun, and meteorological seasons, which are based on annual temperature cycles.