We know Earth’s rotation on a cosmic scale, but seeing it close up requires quantum mechanics. Interferometry is the use of light waves, sound, etc., to identify changes in matter or motion. New ...

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

Deep inside Earth is a solid metal ball that rotates independently of our spinning planet, like a top whirling around inside a bigger top, shrouded in mystery. This inner core has intrigued ...

If you haven’t accomplished as much this summer as you had hoped to, you can blame forces far beyond your control: a few of these dog days, by one measure, are among the shortest you’ve ever lived ...

Global warming has slightly slowed the Earth’s rotation — and it could affect how we measure time. A study published Wednesday found that the melting of polar ice — an accelerating trend driven ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. After a few years of speeding up, our planet now appears to ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

The Earth is pretty good at keeping its pace. However, variations do happen. And on three separate days this summer—July 9, July 22, and August 5—the Earth will spin notably faster than usual. Of ...

Climate change is causing so much polar ice melt that it’s slowing down Earth’s rotation and — here’s the kicker — it will alter how we measure time in the future. That’s the outrageous conclusion ...

Human engineering appears to have moved the planet, literally. According to new research published this month, the global boom in dam construction over the past two centuries has caused measurable ...