Scientists have confirmed that the length of Earth’s day is no longer perfectly consistent. Small but measurable variations ...

Another view from Perseverance shows how windswept Mars' landscape truly is.

Earth reaches its closest point to the sun in its 2026 orbit on Jan. 3. The sun will appear larger in the sky than on any ...

But in all likelihood, the Earth will not see this time, having been engulfed by the Sun in its red giant phase, around 7.6 ...

If you feel like you never have enough hours in the day to do everything you want to do, don't worry. You just have to wait ...

Earth’s rotation is slowly slowing, scientists say, meaning days are getting longer, though the change takes millions of ...

The familiar 24‑hour day is based on how long it takes the Sun to return to the same position in our sky, not on an ...

New research suggests that for about a billion years, Earth’s rotation stayed stable at 19-hour days due to a balance between ...

Four astronauts are about to become the first humans to venture near the moon in more than half a century since NASA's iconic ...

Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

During winter in the United States, the Earth's Northern Hemisphere is tilted away from the sun. Less sunlight shines ...

Some animal names really like to keep you guessing. Just take the “psychedelic earth tiger,” for example. Not a hallucinogen, planet, or tiger, but in fact a very cool spider. Also known as the LSD ...