Technologies

This Hyperspeed Space Sail Could Take Us to Next-Door Star Systems

For years, physicists have been trying to perfect a way to catapult space probes at a fifth the speed of light. One team is flagging an important section of the blueprint.

Only about 4 light-years away from our solar system lies Alpha Centauri, another bustling space neighborhood. It’s anchored by three stars with the same job as our sun, holds planets analogous to our eight famous orbs and may even have an Earth twin hanging out in the habitable zone. Almost like an alternate reality, the star system is a tantalizing region for space explorers.

There’s just one, glaring issue. With our present technology, spacecraft sent toward Alpha Centauri wouldn’t arrive until somewhere around the year 82022. That’s why, in 2016, late astrophysicist Stephen Hawking and investor Yuri Milner launched Breakthrough Starshot — an initiative to send microchip-size space probes over to Alpha Centauri at 20% the speed of light, reducing the whopping travel time to a mere 20 years.

Their blueprint centers on a lightsail that harnesses the power of photons, aka light particles, beamed from an Earth-based laser, instead of wind like a traditional sail. Though it’d fit right in with the sci-fi tech of Star Trek, the idea gained so much popularity that researchers everywhere began studying how to bring the contraption to fruition, hoping to produce a hyperdrive that blasts around the universe at dizzying rates.

Hailing from the University of Pennsylvania, one such team is tackling a big piece of the puzzle. In a pair of papers published this month in the journal Nano Letters, researchers suggested a way to ensure these innovative spacecraft don’t tear from intense laser pulses during the two-decade-long interstellar voyage. Basically, the researchers propose the sail must «billow» in space’s void like standard boat sails wave amid Earth’s winds.

«Some of the lightsail figures from early on were billowing, some were not, but it was not well studied,» said study author Igor Bargatin, an associate professor in the department of mechanical engineering and applied mechanics at the University of Pennsylvania. «What we did is show you definitely need billowing.

«We realized people haven’t really looked at the mechanics of the problem, and in particular, the possibility of tears,» Bargatinadded. «We want to make sure if and when this idea is realized, people pay attention to things that could happen during acceleration.

«We don’t want these sails to fail.»

Interstellar ship parameters

Picture a boat venturing out to sea with a sail attached. The sail will heave with every gust of wind and propel the vessel forward. That propulsion happens because wind hitting the sail bounces off, creating pressure.

Lightsails aren’t all that different.

«When the photons hit our lightsail, they get reflected and they also create pressure,» Bargatin said. «The exact mechanism is a little different because we’re talking light versus actual molecules of air. But they create pressure nonetheless in both cases.» In fact, these devices have already been proven effective to a degree.

In 2010, the Japanese Aerospace Exploration Agency launched a lightsail mission dubbed Ikaros and deemed it a success. In 2019, the experimental LightSail 2 followed suit. Funded by a Kickstarter campaign started by Bill Nye and Neil DeGrasse Tyson, it moved a small satellite in space using pure photon power.

But both Ikaros and LightSail 2 used light emanating from the sun, in contrast to Breakthrough Starshot’s vision of laser beams.

Though sunlight reduces the risk of tears, it’s too weak for Starshot’s endeavor. Plus, Bargatin says, Starshot light pulses must happen within a relatively short period of time because once the lightsail gets too far from Earth, scientists lose their ability to effectively accelerate it.

In short, to reach a fifth the speed of light — so it can access Alpha Centauri in the desired 20 years — within a strict window, lightsails would need extremely strong light pulses possible only with lasers.

«Designed pressures on our lightsails are not huge,» Bargatin said. «They’re about the same as having a penny on your hand.» In scientific terms, the pressure adds up to about 10 pascals, Bargatin says, but consider how we go about our lives without worrying about light pressure at all.

Ten Pascals of light force requires a significant amount of laser power, so unlike Ikaros’ dance with wispy sunrays, lightsails imparted with ultra harsh laser pulses can be badly damaged.

How to build a durable lightsail

According to the researchers, strong laser pulses could create pressure forceful enough to curve and tear the sheet like a taut boat sail may rip if hit by a giant gust of wind.

They believe lightsails must have the ability to «billow» and form a curved shape kind of like a parachute. Both the sail’s length and the radius of curvature, Bargatin explains, should be about 3 meters. In their new papers, the authors outline geometric measurements that ensure optimal billowing.

Even a lightsail protected from tears, however, will encounter other obstacles. To overcome such issues, the major parameter to consider is sail material. The sheets must be strong for durability, lightweight to minimize laser strength, reflect light efficiently for ideal propulsion and shed heat generated from laser pulses.

If the latter bit isn’t taken care of, Bargatin says, the sail could literally melt in space.

«You can come up with a combination of materials. The thicknesses of those materials and curved geometries would allow the sail to survive the pressures that we’re currently designing for,» Bargatin said, noting his team is mostly looking at a material called molybdenum disulfide.

In the grand scheme of things, though, building the massive laser array that’ll beam lightsails forward will be a big hurdle. Researchers working in space-based communication, Bargatin says, are also still figuring out how to retrieve information from the microchip probe attached to the lightsail.

If Breakthrough Starshot’s mechanism works one day, it’ll be a true testament to humanity’s brilliance in the field of science. In an announcement of the organization’s immense goals six years ago, Hawking stated:

«I believe what makes us unique is transcending our limits. Gravity pins us to the ground, but I just flew to America. I lost my voice, but I can still speak, thanks to my voice synthesizer. How do we transcend these limits?

«With our minds and our machines.»

Technologies

Today’s NYT Strands Hints, Answers and Help for Jan. 24 #692

Here are hints and answers for the NYT Strands puzzle for Jan. 24, No. 692.

Looking for the most recent Strands answer? Click here for our daily Strands hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle, Connections and Connections: Sports Edition puzzles.

Today’s NYT Strands puzzle is one of those where the answers only make sense in pairs. There are six answers to find, and each of them matches up with one of the other answers. Some of them are difficult to unscramble, so if you need hints and answers, read on.

I go into depth about the rules for Strands in this story.

If you’re looking for today’s Wordle, Connections and Mini Crossword answers, you can visit CNET’s NYT puzzle hints page.

Read more: NYT Connections Turns 1: These Are the 5 Toughest Puzzles So Far

Hint for today’s Strands puzzle

Today’s Strands theme is: A work of art.

If that doesn’t help you, here’s a clue: On museum walls.

Clue words to unlock in-game hints

Your goal is to find hidden words that fit the puzzle’s theme. If you’re stuck, find any words you can. Every time you find three words of four letters or more, Strands will reveal one of the theme words. These are the words I used to get those hints but any words of four or more letters that you find will work:

FINS, FINE, FINES, GARB, BOAT, GATES, GATES, FIST, RATE, RATS, STAR, PAINT, SILL, SPAT

Answers for today’s Strands puzzle

These are the answers that tie into the theme. The goal of the puzzle is to find them all, including the spangram, a theme word that reaches from one side of the puzzle to the other. When you have all of them (I originally thought there were always eight but learned that the number can vary), every letter on the board will be used. Here are the nonspangram answers:

STARRY, NIGHT, WATER, LILIES, BOATING, PARTY

Today’s Strands spangram

Today’s Strands spangram is FAMOUSPAINTING. To find it, start with the F that’s four letters down on the far-left vertical row, and wind up, across, and then down.

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Toughest Strands puzzles

Here are some of the Strands topics I’ve found to be the toughest.

#1: Dated slang. Maybe you didn’t even use this lingo when it was cool. Toughest word: PHAT.

#2: Thar she blows! I guess marine biologists might ace this one. Toughest word: BALEEN or RIGHT.

#3: Off the hook. Again, it helps to know a lot about sea creatures. Sorry, Charlie. Toughest word: BIGEYE or SKIPJACK.

Technologies

San Diego Comic-Con Draws a Line: No AI Art Allowed at 2026 Event

The long-running fan convention is banning AI-created works from its popular art show.

Like Sarah Connor in The Terminator, San Diego Comic-Con is fighting back against AI. The prestigious, long-running pop culture convention has banned all artwork created by artificial intelligence from the 2026 Comic-Con art show. Rules posted on the Comic-Con website now state that AI-generated art won’t be shown in any form.

«Material created by Artificial Intelligence (AI) either partially or wholly, is not allowed in the art show. If there are questions, the Art Show Coordinator will be the sole judge of acceptability,» the website reads.

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A representative for San Diego Comic-Con did not immediately respond to a request for comment.

In the past, the convention allowed participants to display AI artwork, provided it was clearly marked as such and wasn’t sold. But now, those artists can’t even bring it through the door. The rule change is a response to artist-led pushback, according to a 404 Media report. San Diego Comic-Con is one of the world’s most famous pop culture conventions, uniting comics, movies, television, gaming, cosplay and collectibles.

Jim Zub, writer for the Conan the Barbarian and Dungeons and Dragons comic book series, told CNET he supports Comic-Con’s decision and hopes other conventions will follow their lead.

«Hundreds of thousands of people attend San Diego Comic-Con each year, and the excitement that generates isn’t because they’re eager to meet a computer spitting out homogenized slop,» Zub said.

Zub, who’s also an artist, is scheduled to appear at Comic-Con in 2026.

Entertaining AI

The use of generative AI in comic book and pop culture art has generated controversy in recent years as AI programs have become more skilled at imitating creators.

A central focus of the 2023 actor’s strike involved backlash against the use of AI in movies and television. The issue has continued to roil Hollywood, as actors, special effects designers, and other film workers see the technology as a threat, while some movie studios view AI as a way to reduce production costs.

Netflix has already begun using AI-generated imagery in at least one series, Argentine sci-fi show El Eternauta. CEO Ted Sarandos praised the technology during a 2025 earnings call.

«We remain convinced that AI represents an incredible opportunity to help creators make films and series better, not just cheaper,» Sarandos said at the time.

AI is also an issue in the video game industry, with publishers facing swift backlash whenever fans discover AI was used in a game. The Indie Game Awards rescinded two awards for the hit RPG, Clair Obscur: Expedition 33, after they found out that AI-made placeholder assets were included when the game launched. The game developer quickly patched the assets out.

While the movie and video game industries appear to have mixed views on using AI, Comic-Con has taken a firm stance, at least for now.

«Artists, writers, actors and other creatives gather and celebrate the popular arts in person because the people part of the equation is what matters most,» Zub said.

Technologies

Today’s NYT Mini Crossword Answers for Saturday, Jan. 24

Here are the answers for The New York Times Mini Crossword for Jan. 24.

Looking for the most recent Mini Crossword answer? Click here for today’s Mini Crossword hints, as well as our daily answers and hints for The New York Times Wordle, Strands, Connections and Connections: Sports Edition puzzles.

Need some help with today’s Mini Crossword? It’s a long one, as per usual on Saturday. 1-Down made me awfully hungry! Read on. And if you could use some hints and guidance for daily solving, check out our Mini Crossword tips.

If you’re looking for today’s Wordle, Connections, Connections: Sports Edition and Strands answers, you can visit CNET’s NYT puzzle hints page.

Read more: Tips and Tricks for Solving The New York Times Mini Crossword

Let’s get to those Mini Crossword clues and answers.