This is a cool fact to impress your friends. The length of a day on Earth changes constantly, nudged by the Moon's gravitational pull, shifting winds in the atmosphere, and slow churning movements deep within the planet. It always has. Day length is, in a sense, a living measurement and one that ebbs and flows with the rhythms of a restless, dynamic world. But something new is happening.
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Future Artemis missions could use fiber-optic cables to monitor moonquakes
Fiber-optic cables on the moon could detect moonquakes, offering a simpler way to study lunar activity and support future Artemis missions.
Watch all your favorite sci-fi content like 'For All Mankind' and 'Star City' anywhere with this exclusive deal and get a free $50 Amazon Gift Card and 77% off NordVPN
With up to $513 off, a $50 Amazon voucher and four months free, you can watch sci-fi streaming shows and movies like 'Monarch: Legacy of monsters' securely while traveling.
Hubble revisits the Crab Nebula after 25 years | Space photo of the day for March 24, 2026
NASA has released new Hubble telescope images of the Crab Nebula taken 25 years after the iconic observatory first gazed at the colorful cosmic crustacean.
Arriving safely on Venus and Titan: Different atmospheres affect heat shields differently, study shows
Heat shields keep incoming spacecraft from burning up in planetary atmospheres. Now we're learning that different atmospheres have different effects.
The best Amazon Big Spring Sale deals for 2026: Sizeable savings on drones, Lego, streaming, star projectors and much more
Amazon's Big Spring Sale is your chance to save big on space-and-sci-fi tech and entertainment from the best star projectors, drones, Lego, streaming and more.
Get one last look at the Pleiades before it disappears from the spring sky
Here's how to spot the Pleiades before they become lost in the glow of the setting sun.
Early spring deals for observing the cosmos: Our top picks for stargazers
Do you want to get a better look at the universe around you? I've spotted these early deals on our best binoculars, cameras and telescopes, so you don't have to blow your budget for mind-blowing views.
Smile fuelled for launch
Image: Smile fuelled for launch
NASA announcing update to Artemis moon plans today: Watch it live
NASA will hold a series of events today (March 24) that update us on the agency's plans for the moon and more, and you can watch them live.
XRISM solves famous star’s 50-year mystery
An invisible companion consuming material from the naked-eye star gamma-Cas has been revealed as the culprit for curious X-rays coming from the stellar system. This closes the case on a mystery that has puzzled astronomers for more than fifty years.
Giant Craters May Reveal if Psyche is a Lost Planetary Core
When we think of asteroids, we almost immediately think of giant rocks bouncing around like the iconic chase scene in Empire Strikes Back, and we often hear how they are remnants from the birth of the solar system. While the asteroids that comprise the Main Asteroid Belt of our solar system are not only spread far apart from each other, they are also not all made of rock. One asteroid approximately the size of the State of Massachusetts called 16 Psyche is made of metal, which planetary scientists hypothesize could be the remnants of a protoplanet’s core that didn’t build into a full-fledged planet. But how did such a unique asteroid form?
The Moon: Earth's Celestial Companion
The Moon, Earth's only natural satellite, is a fascinating and essential part of our planet's existence. Below are some interesting facts about its characteristics, history, and effect on Earth.
Scientists find 2 'failed stars' that may have a second chance to shine bright — by getting together
"Failed star" brown dwarfs may get a second chance to shine by colliding and merging to birth a new star.
10 major differences between the 'Project Hail Mary' book and movie
Ryland Grace's world-saving adventure saw a few changes during the jump from the page to the screen; here are ten big differences we spotted.
NASA Has Cracked the Mystery of Asteroid Bennu’s Boulders
A new analysis of samples from the asteroid Bennu has solved a long-standing mystery: Cracks in the boulders strewn across its surface masquerade as sand.
2nd-ever test flight of NASA's 'quiet' X-59 supersonic jet cut short by glitch
NASA's "quiet" supersonic X-59 jet took to the skies for the second time ever on Friday (March 20), but it didn't stay up for long.
Rare daytime fireball may have dropped meteorites on Texas: Here's where to find them
The fireball shattered with the force of 26 tons of TNT, potentially spreading shards over a swathe of Texas land.
Astrophotographer spies Thor's Helmet shining 15,000 light-years away in spectacular photo
A massive stellar wind bubble sculpts the nebula into the shape of the Norse god's famous helmet.
Celeste: Countdown to Launch 1
Video: 00:03:50
On 25 March, the first two satellites of the Celeste in-orbit demonstration mission will lift off aboard Rocket Lab’s Electron rocket from the company’s Māhia Launch Complex in New Zealand.
Triangulum Galaxy dazzles in psychedelic color | Space photo of the day for March 23, 2026
Astronomers captured a colorful new portrait of the Triangulum Galaxy, revealing complex clouds of gas in between the galaxy's 40 billion stars.
