The time it takes for the sun to completely rotate depends where on the sun you are measuring.

Once every 24 hours, Earth completes one rotation on its axis, marking one day on our planet. This reliable rotational period is what allowed humans to develop systems to tell time and what signals to ...

Tracking the rotation speed of solid planets, like the Earth and Mars, is a relatively simple task: Just measure the time it takes for a surface feature to roll into view again. But giant gas planets ...

An international team of astronomers using the NASA/ESA Hubble Space Telescope have made new measurements of Uranus' interior rotation rate with a novel technique, achieving a level of accuracy 1,000 ...

Somewhere deep below Saturn s cloud tops, the planet rotates at a constant speed. Determining this interior period of rotation has proven extremely complicated. Now, with new Cassini results, a team ...

Astronomers have found that the rotational profile of a nearby star, V889 Herculis, differs considerably from that of the Sun. The observation provides insights into the fundamental stellar ...

Our grasp of how stars rotate is "insufficient," with implications on our ability to understand the causes of phenomena on the sun like solar flares and coronal mass ejections that cause aurora and ...