A violent collision with the hypothetical planet Theia may have delivered Earth’s water and set the stage for life.

According to Accuweather, the sun is directly over the equator during the autumn equinox. Due to the planet’s geometry, the rays beat down evenly across much of Earth. Here in the northern hemisphere, ...

The fall season is marked by the autumnal equinox, a time when the Earth's axis is tilted neither toward nor away from the ...

As they whirl around in low-Earth orbit, satellite configurations are far more sensitive to changes in Earth's gravity field ...

The fall equinox marks the first day of autumn. When does fall officially begin in 2025? This visual guide will help get you oriented.

Earth's core cannot be made just of iron — it also appears to contain carbon. And our research suggests it may contain a bit ...

As summer winds down, the official start of fall is just days away. For the Northeast, the first day of fall will arrive this ...