The solar cycle can be irregular, but some patterns might be trackable—enough to provide a heads-up before extreme weather ...

The romance of Prague is enthralling, from its pretty winding lanes to its skyline of rising spires. Over the past few ...

A newly discovered turning point in the Sun’s 11-year cycle could allow scientists to predict future solar activity years ...

Thanks to a speed-up of Earth's rotation, the length of the astronomical day and the length of the clock day aren't quite ...

While Egypt is famous for its monuments, ancient Mexico is home to thousands of pyramids that remain largely unmapped and ...

On Tuesday the U.S. House of Representatives passed the Sunshine Protection Act, a measure to enact year-round daylight ...

The launch, which could take place this summer, is just a beta test of the basic technology, but Reflect Orbital—which bills ...

Soon, the first day of fall, or the autumnal equinox, will arrive, and then we'll fall back. Astronomical fall begins at 8:05 ...

Add Yahoo as a preferred source to see more of our stories on Google. As the U.S. commemorates the 250th anniversary of the signing of the Declaration of Independence, Tiffany & Co. is bringing a ...

The solstice this weekend marked the start of astronomical summer — and in Washington, D.C., that means the legislative clock is ticking. Lawmakers are eager to head home and campaign on a housing ...

One reality of modern life is that people walking down a sidewalk tend to have their attention focused downward at their phones. Our lives exist inside those phones. But should they? Public clocks are ...

Two independent research teams have achieved a longstanding goal in physics: building a working nuclear clock. The devices, developed by Beichen Huang and colleagues at Tsinghua University and by Luca ...