The Red Planet's spin is speeding up a hair fast enough to shorten the length of a Martian day by a fraction of a millisecond per year. "It’s really cool to be able to get this latest measurement — ...

A simple explanation of Earth’s rotation speed, how it creates day and night, and how scientists measure the planet’s motion.

BBC Horizon Documentary. Jupiter, the largest and fastest rotating planet among the eight major planets in the solar system, is the fifth planet from the inside out. This film tells the latest ...

First detected in 2004, the dwarf planetHaumeaquickly stood out due to its rapid rotation and elongated form. But the 2017 discovery of a ring system around it added a new level of complexity to an ...

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 ...