Ubisoft's ambitious open-world game remains the best way to immerse yourself in Pandora's lush locales, exotic creatures, and fierce battles.
Our middle-aged Solar System is mostly calm and stable, with fully-formed planets staying in their lanes while placidly orbiting the Sun. But it wasn't always this way. The Solar System had a tempestuous youth, full of collisions that shattered many bodies into tiny pieces. The debris-strewn main asteroid belt is evidence of this.
A photographer in Italy captured an ultra-rare elve and red sprite flashing above the Alps in a single breathtaking moment.
Whether you're buying for yourself or hunting for a gift for a keen astrophotographer, there's still time to save hundreds with these last-minute deals on cameras and lenses.
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On 17 December 2025, two new Galileo satellites lifted off from Europe’s Spaceport in French Guiana. This was the 14th launch for Europe’s satellite navigation operational satellite programme, reinforcing Europe’s resilience and autonomy. The flight, VA266, was the first launch of Galileo satellites on Europe’s newest heavy-lift launcher Ariane 6.
On 14 January 2026, the European Space Agency (ESA) will hold an online post-CM25 industry event for all ESA industrial partners.
"Virgil has two personalities, its 'good' side – a typical young galaxy quietly forming stars. But Virgil transforms into the host of a heavily obscured supermassive black hole, pouring out immense quantities of energy."
Do you know what time it is? It's an easy question, right? Just look at your phone or watch. But is that really the exact time? Oh, well, for that you can look to Coordinated Universal Time, or UTC. It's what your phone clock is synced to, give or take, but you can get a more accurate measure of UTC with a device that can pick up the UTC radio time signal. Of course, UTC is only an agreed-upon standard that tries to stay in sync with Earth's rotation. It, in turn, is based upon International Atomic Time (TAI), which is a weighted average of 450 atomic clocks located all over the world.
We greet the winter solstice. Jupiter nears opposition. Will the two Dog Stars balance for you? And meet the House in the Hyades.
"There is a lot to keep us busy."
If you're a Pandora-loving moviegoer who can't get enough of the Na'vi culture, keep an eye on these stunning Lego Avatar sets.
Astrophotographer Josh Dury has captured the beauty of the Geminids in this stunning timelapse exposure.
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The South Korean startup Innospace will attempt its first orbital launch from Brazil's Alcântara Space Center on Friday (Dec. 19), and you can watch the action live.
Getting close to things is one way for scientists to collect better data about them. But that's been hard to do for the Sun, since getting close to it typically entails getting burnt to a crisp. Just ask Icarus. But if Icarus had survived his close encounter with the Sun, he might have been able to see massive magnetic “tadpoles” tens of thousands of kilometers wide reconnecting back down to the surface of our star. Or maybe not, because he had human eyes, not the exceptionally sensitive Wide-Field imagers the Parker Solar Probe used to look at the Sun while it made its closest ever pass to our closest star. A new paper in The Astrophysical Journal Letters from Angelos Vourlidas of Johns Hopkins University’s Applied Physics Laboratory and his co-authors describes what they say on humanity’s closest brush with the Sun so far.
3I/ATLAS has now made its closest approach to the sun and Earth and is now heading back out toward the outer solar system.
For one, it came down to timing.
Image: Dwarf stars in a glittering sky
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