Technologies

Space Cities Inside Asteroids Could Actually Work, Scientists Say

The plan «on the edge of science and science fiction» involves an asteroid, an expandable mesh bag and a whole lot of audacity.

Good news, Earthlings. We have more to look forward to than just the drab landscape of the moon or the inhospitable surface of Mars when it comes to far-flung future human civilizations off this rock. We might one day be living la vida asteroid.

Yes, space-faring piles of rocky rubble (like famous asteroid Bennu) could be home sweet home. A group of scientists at the University of Rochester in New York worked out a plan for turning asteroids into spinning space cities with artificial gravity. The researchers published a «wildly theoretical» study in Frontiers in Astronomy and Space Sciences earlier this year.

«Our paper lives on the edge of science and science fiction,» said co-author Adam Frank in a University of Rochester statement last week. Frank is a professor of physics and astronomy at the school.

The basic concept behind the asteroid city builds on an idea called the O’Neill cylinder, a rotating space colony design proposed by physicist Gerard O’Neill in the 1970s. The rotation creates artificial gravity. Think of something along the lines of the cylindrical Cooper Station in the movie Interstellar. It’s a fascinating idea, but it would be difficult and expensive to transport enough material into space to make a large-scale O’Neill cylinder.

This is where things get wilder. The Rochester research team proposes a way to turn a rock pile of an asteroid into a cylinder by surrounding it with a thin, high-strength mesh bag made from carbon nanofibers. It would have an accordion-like design.

«A cylindrical containment bag constructed from carbon nanotubes would be extremely light relative to the mass of the asteroid rubble and the habitat, yet strong enough to hold everything together,» said study co-author Peter Miklavcic, a doctoral candidate in mechanical engineering.

Spinning an asteroid would cause its rubble to break apart, expanding the bag and creating a layer of rock against it. That layer would provide radiation shielding for a colony inside the cylinder while the continued spin would create artificial gravity.

It sounds far-fetched, but Frank said the technologies and engineering behind the asteroid city technically obey the laws of physics. «Based on our calculations, a 300-meter-diameter asteroid just a few football fields across could be expanded into a cylindrical space habitat with about 22 square miles of living area,» Frank said. «That’s roughly the size of Manhattan.»

Of course, bagging and spinning an asteroid wouldn’t be simple. The researchers suggest using solar-powered rubble cannons to get the spin going. There’s also the matter of constructing a human-safe colony on the interior, but we can leave those challenges for the future.

Sci-fi writers have long envisioned life on asteroids. The paper provides a new way of thinking through that possibility in a way that could protect human occupants and make them feel more at home. It’s a good companion piece to another recent space thought experiment that offered up a plan for building a «forest bubble» on Mars.

My imagination is now taking me from my cozy quarters inside an asteroid to a vacation destination in a Martian nature reserve. This may not be relegated to the realm of sci-fi forever. «Space cities might seem like a fantasy now,» Frank said, «but history shows that a century or so of technological progress can make impossible things possible.»

Technologies

Today’s NYT Mini Crossword Answers for Friday, April 25

Here are the answers for The New York Times Mini Crossword for April 25.

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.

Today’s NYT Mini Crossword is a pretty easy one. 9-Across — the «dog-tor» clue — was a bit of a groaner, but I’ll take an easy answer over a witty, confusing clue any day. 4-Down was a little confusing, but once I filled in the other letters it made sense. (TEXAS and IOWA could’ve fit in 5-Across and 8-Across, with one T replaced in each answer.) Need some help with today’s Mini Crossword? Read on. And if you could use some hints and guidance for daily solving, check out our Mini Crossword tips.

The Mini Crossword is just one of many games in the Times’ games collection. 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 at those Mini Crossword clues and answers.

Mini across clues and answers

1A clue: «Beware the ___ of March»
Answer: IDES

5A clue: Sends a message
Answer: TEXTS

7A clue: Pond scum
Answer: ALGAE

8A clue: Teeny-tiny bit
Answer: IOTA

9A clue: Doctor who might more aptly be called a «dogtor»
Answer: VET

Mini down clues and answers

1D clue: «Don’t call ___ comeback!»
Answer: ITA

2D clue: Supermarket section
Answer: DELI

3D clue: Arnold Schwarzenegger or Chris Christie, e.g., for short
Answer: EXGOV

4D clue: 5-Across or 8-Across, if you change the T’s in this answer
Answer: STATE

6D clue: Musical chairs need
Answer: SEAT

How to play more Mini Crosswords

The New York Times Games section offers a large number of online games, but only some of them are free for all to play. You can play the current day’s Mini Crossword for free, but you’ll need a subscription to the Times Games section to play older puzzles from the archives.

Technologies

Razer Releases a Vertical Edition Ergonomic Mouse

Two new mice for productivity still look like they were made for gamers, and that’s okay.

Razer has unveiled the Pro Click V2 and the Pro Click V2 Vertical Edition — two PC mice with ergonomics in mind, complete with expected Razer Chroma RGB LEDs in tow. The latter mouse, revealed Thursday, is Razer’s first vertical mouse and is priced to go head to head with the likes of Logitech’s vertical mouse offerings like the Lift and MX Vertical.

As with almost any new tech product in 2025, the new Pro Click V2 mice will also ship with artificial intelligence features in the form of Razer’s AI Prompt Master, a productivity feature that will give you easier access to services like Microsoft Copilot.

Both mice are available starting Thursday for $100 for the V2, and $120 for the V2 vertical mouse.

Razer is going for a «do it all» mouse with the Pro Click V2

The Pro Click V2 and Pro Click V2 Vertical editions are shaped to fit your hand’s natural resting positions, making it more comfortable and easier to use for long periods of time. The Pro Click V2 is designed at a 30-degree angle and the Pro Click V2 Vertical is tilted at 71.7 degrees, which Razer says is the natural angle of a handshake.

Of course, these are «productivity meets gaming» mice, so you can also expect a host of Razer features that you’d find on its gaming mice offerings. That said, the updated mice do feel more gaming forward than their predecessors. Both include the Razer Focus Pro 30K Optical Sensors for ultra precision and the mice should be able to track easily on glass. The mechanical buttons are said to be up to 6x more durable than the industry average and should be able to take 60 million clicks in their lifecycles.

Both mice received the RGB treatment, with multi-zone lighting that can be customized further with Razer’s Synapse software. There you can also adjust DPI setting defaults and more.

Lastly, both mice should last a long time on a single charge: the Pro Click V2 offers up 3.5 months of battery life while the Vertical Edition can reach up to six months before needing to be charged again. Both mice can be charged via USB-C, and a 5-minute charge can give you 2 to 3 days of battery power when you’re in a pinch.

For more, don’t miss how tariffs are boosting the secondhand tech product market.