As atmospheric observations of exoplanets become increasingly precise, it is more important than ever to correctly account ...

These distant worlds are called exoplanets: planets that exist outside our solar system. Most of the exoplanets scientists have discovered so far orbit stars within the Milky Way, but some lie even ...

Ever since its formation around 4.5 billion years ago, Earth's rotation has been gradually slowing down, and its days have ...

Because oxygen seeps (diffuses) out of mats slowly, the timing of sunlight becomes a big deal. Short days mean the sun sets ...

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 ...

Venus is, let's face it, a weirdo. Often called Earth's "twin" due to its size and density, the planet is actually far different from our own. The rest of this article is behind a paywall. Please sign ...

Can a movement many feet below our feet quietly change the Earth’s rotation? Over 3,000 miles below the ground, the Earth’s ...

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 ...

Add this to Mars’ long list of mysteries. NASA’s now defunct InSight Mars Lander has produced data that indicates that the red planet’s rotation rate, the rate at which it spins on its axis, is ...

A planet's year length depends on its distance from the Sun. Planets closer to the Sun have shorter years. A planet's rotation speed is unrelated to its year length. Planets' orbital speeds vary ...

On Mars, things are a lot more static. It’s a single-plate planet with incredibly slow mixing. When InSight peered into the ...