Tag

Timekeeping

All articles tagged with #timekeeping

science20 days ago•6 min saved

Nuclear clocks near reality promise ultra-precise timekeeping

Physicists are closing in on a nuclear clock that would use transitions in the thorium-229 nucleus to time events, following a 2024 laser breakthrough that pinpointed the key energy transition. The remaining challenge is building a stable 148-nanometer ultraviolet laser to drive the transition. Teams across China, Europe, Japan and the US are assembling the components, with some researchers predicting initial measurements as early as 2026, which could yield a compact, noise-resistant clock that may surpass current optical atomic clocks.

via Nature|

#nuclear-clock #optical-clocks #science

sports1 month ago•7 min saved

VAR Expanded and Tempo Rules Set for World Cup

IFAB approved a broader VAR remit for the World Cup (including corners and wrong-team bookings) and introduced tempo measures to curb stoppages—countdowns on goal-kicks, throw-ins and substitutions, plus a 10-second rule for substitutes and a one-minute delay for players coming off injured. Changes take effect June 1 for the 2026-27 season, with trials planned on offside (Wenger’s daylight-offside in Canada) and other topics such as mouth-covering rules and DOGSO extensions to cover teammates. Some leagues, notably the Premier League, are expected to opt out of corner reviews. There are exemptions (goalkeepers unaffected, penalties and certain bookings), and a continued lack of consensus on tackling tactical timeouts.

via BBC|

#football-rules #ifab #sports

science3 months ago•5 min saved

Scientists Confirm Time Moves Faster on Mars

Scientists at NIST have calculated that clocks on Mars run approximately 477 microseconds faster per day than on Earth, with variations due to Mars' orbit and gravity, which is crucial for future Mars exploration and interplanetary communication systems.

via ScienceDaily|

#interplanetary-communication #mars #nasa

science3 months ago•2 min saved

Colorado Windstorm Disrupts U.S. Official Time by Microseconds

A power outage at NIST in Boulder caused a disruption in atomic clock operations, affecting internet time servers globally. Backup systems were activated, restoring accurate time within nanoseconds, but the incident highlights the critical role of atomic clocks in modern technology like GPS and financial systems.

via WRAL|

#atomic-clock #colorado-fire-weather #internet-disruption

science3 months ago•1 min saved

Power Outages Disrupt Atomic Clocks and Internet Time Services in Colorado

Last week, some of the world's most precise atomic clocks were off by about five-millionths of a second due to a wind-induced power outage, highlighting the sensitivity of high-precision time standards used globally.

via The New York Times|

#atomic-clocks #national-institute-of-standards-and-technology #power-outage

science3 months ago•2 min saved

Boulder Power Outage Disrupts Atomic Clock, NIST Assures Time Integrity

A power outage caused by preemptive shutdowns in Boulder temporarily affected the NIST F-4 atomic clock, resulting in a minimal 4 microsecond drift in time measurement, but the system's redundancies ensure no significant impact on global timekeeping or critical industries.

via CBS News|

#atomic-clock #boulder #nist

science3 months ago•3 min saved

Scientists Discover How Much Faster Time Passes on Mars

Scientists from NIST have determined that clocks on Mars run approximately 477 microseconds faster per day than on Earth due to gravitational effects, with variations throughout the Martian year, which is crucial for future Mars missions and interplanetary navigation.

via ScienceAlert|

#mars #relativity #science

technology7 months ago•2 min saved

2025 One Hertz Challenge: Precision Timekeeping at One Becquerel

Mihai Cuciuc created a unique clock that ticks at one becquerel, using a clever setup with an Am-241 source and coincidence detection to produce a stable one-hertz signal based on radioactive decay, despite the inherent randomness of such decay processes.

via Hackaday|

#becquerel #clock #mihai-cuciuc

science8 months ago•2 min saved

Earth's Rotation Speed Changes: Shortest Day on Record or Warning Sign?

On August 5, 2025, Earth experienced a slight slowdown in its rotation, making the day about 1.45 milliseconds longer due to atmospheric, oceanic, and internal planetary factors, highlighting the complex and dynamic forces influencing our planet's spin.

via WION|

#atmospheric-conditions #earth-rotation #internal-earth-processes

science8 months ago•4 min saved

Earth's Days Shorten as Scientists Warn of Global Disruptions

Scientists have observed that Earth's rotation is accelerating, leading to the possibility of introducing a negative leap second to maintain time synchronization, which could cause significant disruptions in global time-dependent systems.

via The Daily Galaxy|

#earth-rotation #global-disruptions #leap-second

science8 months ago•3 min saved

Earth's Rapid Spin on July 22 Sparks First-Ever 'Negative Leap Second'

Earth's recent faster rotation has led to discussions about implementing a negative leap second to keep atomic time aligned with astronomical time, but concerns over system disruptions and international coordination make its adoption unlikely in the near future.

via Gizmodo|

#earth-rotation #leap-second #negative-leap-second

science8 months ago•4 min saved

Earth's Days Shorten as Spin Accelerates, Prompting Scientific Reassessment

This summer, Earth experienced some of the shortest days in recorded history due to the planet spinning faster, influenced by factors like lunar gravity, atmospheric changes, and internal core dynamics. While these millisecond variations are imperceptible to humans, they have significant implications for precise timekeeping and technology, with scientists uncertain about future trends due to complex geophysical interactions.

via National Geographic|

#climate-change #earth-rotation #moon-influence

science8 months ago•7 min saved

Earth's Days Shorten Significantly Due to Accelerating Rotation

Earth is spinning faster this summer, causing shorter days and prompting scientists to consider the possibility of negative leap seconds, with factors like lunar tides, atmospheric changes, and climate change influencing Earth's rotation.

via CNN|

#climate-change #earth-rotation #earth-speed

science8 months ago•4 min saved

Global Breakthroughs in Atomic Clocks Redefine the Second with Unprecedented Precision

NIST has developed the most precise atomic clock using aluminum ions, measuring time with unprecedented accuracy to the 19th decimal place, which could revolutionize scientific research, quantum technology, and geodesy.

via Rude Baguette|

#atomic-clock #nist #precision

science9 months ago•4 min saved

Nuclear Clock Breakthrough Aids Dark Matter Research

Scientists have developed a new method using thorium-229 in a nuclear clock to detect dark matter by measuring tiny shifts in atomic resonance frequencies, potentially revolutionizing our understanding of the universe's elusive dark matter and offering unprecedented precision in detection.

via The Daily Galaxy|

#dark-matter #nuclear-clock #quantum-physics