A leap second is a one-second modification that is sometimes used with atomic clocks, whenever there is a change in Earth's ...

Since 2020, the Earth has been spinning faster – hence the uncertainty in the exact date of the shortest day in 2025.

Earth is expected to spin slightly faster on three specific days in July and August: July 9, July 22 and August 5. This could ...

A frightening simulation shows what would happen if the world was to stop spinning. As we all know (and if you don’t, give ...

From the point of view of the sun, it takes Earth roughly 86,400 seconds (24 hours) to complete one full rotation. This ...

Since 2020 (and for reasons that are still unclear), the Earth has been rotating on its axis more quickly than usual, and the ...

You might have seen the claim online, and it’s at least partially right, but it's not the only other number of days Earth has had.

Earlier research had found that the rings of Saturn respond to vibrations within the planet. Saturn's interior vibrates at frequencies that cause slight variations in its gravitational field, and the ...

Since Kepler's laws of motion dictate that celestial bodies orbit more slowly when farther from the sun, we are now moving at ...

On Jan. 4, Earth received its maximum radiation from the sun, which was at its largest in the sky for 2025. The difference isn't huge — the sun today appears to be a mere arcminute (1/60th of a degree ...

Earth's rotation is expected to speed up in July and August this year, resulting in shorter days. Specifically, July 9, July ...

Earth's rotation has sped up, causing shorter days. Astrophysicist Graham Jones predicts the next shortest day is around the ...