For more than 40 years, planetary scientists believed they knew how long a day on Saturn lasted. They were listening to the ...

Our planet may have had a recent change of heart. Earth’s inner core may have temporarily stopped rotating relative to the mantle and surface, researchers report in the January 23 Nature Geoscience.

JWST’s NIRSpec aurora maps, 10 times sharper than Cassini-era data, exposed a planetary heat engine of aurora, winds, and ...

A change of milliseconds seems insignificant, but it can cause problems for our clocks, GPS and navigation apps, and satellites.

Editor’s note: Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Mars is rotating more quickly than it ...

Some of the drivers causing the Earth to rotate on its axis are wind and wave action. How is it possible that the Earth makes one revolution in exactly 24 hours when the winds and waves are so ...

This image illustrates how a star illuminates and heats the day side of a synchronously rotating planet, and the phenomena of transit and occultation (eclipse). The bottom of the figure shows the ...

Paul M. Sutter is an astrophysicist at SUNY Stony Brook and the Flatiron Institute, host of Ask a Spaceman and Space Radio, and author of How to Die in Space. He contributed this article to ...