How to start sky exploring with that new telescope. How to set it up right, other key things to know -- and great cosmic immensities to start finding tonight.

The axion could be a contender to explain the mystery of dark matter.

The two largest and most expensive Lego Star Wars sets available go head-to-head: The UCS Millennium Falcon and the UCS Death Star. But which is best?

The microwave-sized sensor detects 'spectral fingerprints' of important minerals.

China overcomes human spaceflight emergency and makes leaps with lunar hardware tests

Using the Hubble space telescope, astronomers have imaged "'Dracula’s Chivito" the largest site of planetary birth ever seen.

On Christmas Eve 1968, the Earth received a message from astronauts on a mission like no other - the first around the moon. NASA will return in 2026.

The reindeer ain't got time to bleed.

The South Sandwich Islands were born from a tectonic collision, forged by volcanism and relentlessly reshaped by ice, wind and waves.

2025 was another big year for black holes, and here's our pick of the top black hole stories from the last twelve months.

According to the patent, habitable modules would rotate around a central axis to simulate gravity for crew by producing an outward-pushing centrifugal force.

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.