The "equinox effect" doubles the chance of auroral activity in March and September, when the fall equinox occurs, scientists say.

Earth’s spin is not as steady as it looks. As ice melts and groundwater is pumped from deep aquifers to the surface, the planet’s mass is shifting, and with it the position of the rotational axis that ...

NASA says it has now pinned down three causes for this shift. As expected, the loss of polar ice is a major contributor. Share on Facebook (opens in a new window) Share on X (opens in a new window) ...

As Earth moves through space, it wobbles slightly. A team of researchers from the Technical University of Munich (TUM) and the University of Bonn has now succeeded in measuring these fluctuations in ...

A typical desk globe is designed to be a geometric sphere and to rotate smoothly when you spin it. Our actual planet is far less perfect — in both shape and in rotation. Earth is not a perfect sphere.