In a galaxy not so far away, Lego sets can be VERY expensive: Here are the most expensive Lego Star Wars sets you can currently buy.

Outside Earth's protection, space travellers will be routinely exposed.

Early risers across North America and Europe may spot a bright, silent light gliding across the Christmas sky — and it just happens to coincide with an ISS flyby.

Fast solar wind and a possible glancing blow from a coronal mass ejection could spark auroras over Christmas.

3I/ATLAS may have moved away from Earth as it makes its way out of the solar system, but this interstellar intruder continues to delight and surprise astronomers.

Astronomers are trying to determine if they've witnessed a complex stellar explosion or a relatively ordinary supernova.

An Indian LVM3 rocket is scheduled to launch the massive BlueBird 6 smartphone satellite for AST SpaceMobile tonight (Dec. 23), and you can watch the action live.

What is Earth's Orbit?

Earth's orbit is the path on which Earth travels around the Sun. This path is not a perfect circle but an ellipse, which means that the distance between the Earth and the Sun changes throughout the year. 

"Science doesn't always go as planned. In any case, there's a lot of work to be done."

Highlights from a cometary trio that captured our imaginations.

The "America 250" logo commemorates the upcoming 250th anniversary of the signing of the Declaration of Independence.

We just got a great up-close look at a SpaceX Starlink satellite that recently suffered an anomaly in orbit, thanks to Vantor's WorldView-3 spacecraft.

From a crescent moon and a 'Christmas Star' to deep sky delights, the wonders of the holiday night sky are yours to explore.

The South Korean startup Innospace failed during its first orbital launch attempt, which sent five satellites aloft on Dec. 22 from Brazil.

Test your cosmic eye: can you match these dazzling nebula images to their names?

Watch those skies! In 2025, quality television really did come from outer space.

Yuletide season is officially upon us and here's a joyous array of new titles to add to your holiday reading list.

NORAD celebrates its 70th year of tracking Santa Claus as he flies around the world delivering joy this Christmas Eve.

Eileen Collins: Biography and Achievements