When Santa is done delivering presents on Christmas Eve, he must get back home to the North Pole, even if it’s snowing so ...

Earth is often described as a circle or an oval, but it is neither. As the planet spins more than 1,000 miles per hour at the ...

The shape of the universe is not something we often think about. My colleagues and I have published a new study that suggests ...

The winter solstice happens once a year when the Earth’s axis is tilted furthest from the sun in the northern or southern ...

Sunday is the shortest day of the year north of the equator, where the solstice marks the start of astronomical winter. It’s ...

Meteorological winter began on Dec. 1 while astronomical winter began on Dec. 21. Astronomical seasons are based on the Earth's position in connection with the sun.

Physicists at NASA and Princeton generate electricity from the Earth's rotation: could wind energy be our energy source of ...

The shortest day of the year in 2025, or the winter solstice, is on Sunday, Dec. 21 at 10:03 a.m. ET, according to the Old ...

The winter solstice also marks the first official day of winter in the Northern Hemisphere. Here's what to know this year.

The 2025 winter solstice will take place at 10:03 a.m. Eastern time Sunday, Dec. 21. The winter solstice is almost here to ...

The mysterious object 3I/ATLAS is making its closest pass to Earth today, and astrophysicist Avi Loeb joins us to discuss the ...

The first day of winter is Dec. 21, the date of this year's winter solstice for the northern hemisphere. Winter lasts from ...