Now a Japanese company has commercialized one approach—an optical-lattice clock it claims is the most accurate on the market.

NASA and SpaceX are targeting no earlier than 4:15 a.m. EDT on Monday, April 21, for the next launch to deliver scientific ...

Astronomers have found thousands of exoplanets — worlds beyond our solar system. Most of them are in single-star systems, ...

One hundred years ago, astronomers captured the light of stars behind the sun during ... He used Einstein’s equations describing general relativity—published only months before—to suggest ...

New research has uncovered how a simple circadian clock network demonstrates advanced noise-filtering capabilities, enhancing ...

A network of Earth's best clocks will be synchronised with the most accurate one ever sent into space. But the device has a ...

For a good night of sleep, consider getting your circadian rhythm back in sync with the sun. Here’s how to do it.

Waking up is hard, but the best alarm clock can make mornings a little bit easier — or at least help you keep to a schedule. From the best sunrise alarm clocks to the best silent alarm clocks ...

The good news? The best alarm clocks right now are built to make mornings better—with soft light, smarter sound, and designs worthy of showing off. Some of these clocks are so good, you’ll ...

With life’s busy schedule, keeping track of time without a clock is challenging. We’re so dependent on this device that even when we go to sleep, we need an alarm clock to remind us to wake up.