Precession is why the Pole Star changes over time. Currently Earth's rotational axis is pointed toward Polaris in Ursa Minor, but in the past it has pointed at different stars, and will do so ...

Deaths of nearby massive stars may have played a significant role in triggering at least two mass extinction events in ...

Changes in Earth's orbit have helped pace climatic change for millennia. Scientists are now trying to understand whether - and how - these changes remodeled the landscapes our ancient ancestors ...

A pattern of encroaching and retreating ice sheets during and between ice ages has been shown to match certain orbital parameters of Earth around the sun, leading to researchers being able to ...