Why does the New Year begin on January 1?

Why does the New Year begin on January 1? The tradition stems from the festival of Janus, the Roman god of past and future.

No leap second for December 31, 2021

World timekeepers have decreed there will be no leap second on December 31, 2021. Overall the spin of Earth is slowing down, but in 2020 it sped up.

‘We love it.’ Webb in arts and crafts

People kept busy while anticipating the James Webb Space Telescope launch by creating a huge array of inspiring arts and crafts.

Apollo 8 Earthrise photo anniversary, December 24

The iconic "Earthrise photo," taken Christmas Eve, 1968, from Apollo 8 during its orbit of the moon, helped launch the environmental movement.

Personal solstices: EarthSky community photos

Personal solstices - photos from the EarthSky community around the world - showing what the December solstice means to them.

Hole punch clouds are made by jets. Photos here

Hole punch clouds are a type of cloud that features a flat cloud layer interrupted by a big hole, often with wisps at the center, created by aircraft.

December birthstone: turquoise, zircon or tanzanite

The December birthstone is either the exquisite blue-green turquoise, dazzling zircon, or the magnificent blue-violet tanzanite. Your choice!

Audubon Christmas Bird Count starts December 14

The Audubon Christmas Bird Count, held each winter, is one of the longest-running community science projects. You can help collect important data about birds.

La Palma volcano has been erupting for 2 months

The La Palma volcano - which began on September 19, 2021 - has now been erupting for 2 months. It has claimed one life and forced thousands to evacuate.

Virtual reality can combat isolation on Earth and in space

Virtual reality may help alleviate some of the negative feelings of isolation, and this has potential implications for space travel.