A Mars crater may have once contained water that sloshed back and forth as a tide came and went. If that is true, it follows that Mars must have had a moon that was massive enough to exert a ...

The biggest stories of the day delivered to your inbox.

A full moon rises behind illuminated Christmas decorations on Dec. 4 in Glastonbury, England. (Matt Cardy/Getty Images) The final full moon of the year — a supermoon known as the cold moon — shone ...

December's "Cold Moon" rose on Dec. 4 as it neared its closest point to Earth in its monthly orbit. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

The next full moon, a cold moon, will be visible on Dec. 4 at 6:14 p.m., according to TimeandDate.com. After the full moon, a last quarter new moon will appear on Dec. 11 at 3:52 p.m., followed by a ...

A cold supermoon is on its way. On December 4, Earth's satellite will delight us with one of the last astronomical spectacles of 2025. Not only will it be the last full moon of the year, but it's also ...

The last full moon of 2025 will rise on Dec. 4, bringing with it brighter skies and a second round of king tides to the Oregon Coast. December's full moon is known as the Cold Moon and is also the ...

The last full moon of the month is coming up this week, and it's going to be special. The December full moon, also known as the cold moon, will rise early in the month, on Thursday, Dec. 4, 2025 at ...

December isn't just Christmas and New Year's Eve. It's also when a dazzling astronomical event will take place. The next full moon over Georgia won't just be the last full moon of the year and the ...

The full cold moon — the third and final of fall in the Northern Hemisphere — will turn full on Thursday, Dec. 4, 2025. Named for the chilly temperatures at this time of year in North America, this ...

Small, icy moons might be boiling under their surface. Many moons in the outer solar system are thought to harbor subsurface oceans beneath their icy crusts. New computer simulations, reported ...

Our exploration of the outer Solar System has revealed a host of icy moons, many with surface features that suggest a complex geology. In some cases, these features—most notably the geysers of ...