Technologies

NASA satellite witnesses rare sight: Dying star ‘switching on and off’

In a «totally unexpected» turn of events, a white dwarf couldn’t swallow any of its star food floating nearby. That forced its lights to go out.

Deep within the cosmos, a fading star’s quiet death was sharply interrupted. Instead of gracefully vanishing into the heavy darkness of space, as stars typically do, it coughed out a mysterious, prolonged flicker of light.

This «has never been seen in other accreting white dwarfs,» Simone Scaringi, an astronomer at Durham University’s Centre for Extragalactic Astronomy in the United Kingdom, said in a statement. «It appears to be switching on and off.» Scaringi is lead author of a study on the star published Monday in the journal Nature Astronomy.

Every iridescent star that decorates our universe — and those yet to add to the glittering collection — will one day disappear. Slowly but surely, their luster, fueled by heaps of hydrogen gas, will dwindle as the supply runs out. Entering their final stages of life, they will become white dwarfs.

And NASA’s Transiting Exoplanet Survey Satellite, or TESS, caught a unique glimpse of this particular white dwarf’s strange behavior. The dying star is part of the two-star system dubbed TW Pictoris, located 1,400 light-years away.

«To see the brightness of TW Pictoris plummet in 30 minutes is, in itself, extraordinary,» Scaringi said. His team believes the star unexpectedly lost illumination because of a sudden hurdle in its food-funneling mechanism. Basically, the shiny space ball’s fiery snacks were falling out of reach.

White dwarfs feast on their companion stars by pulling flaming bits of the body into their Saturn-like ring of matter, or accretion disc, held in place by suspended magnetic fields. Swallowing a delicious bite makes a white dwarf literally light up with glee.

But these gently glimmering orbs are expected to pace themselves while feeding off their companion stars, meaning the sparkly spheres’ luminescence should dim gradually as they finish their dinner. Darkness isn’t anticipated to happen all at once, the way it did with TW Pictoris.

«The brightness variations seen in accreting white dwarfs are generally relatively slow, occurring on timescales of days to months,» Scaringi said. That’s why, he explained, TW Pictoris’ white dwarf switching off is «totally unexpected from our understanding of how these systems are supposed to feed through the accretion disc.»

In decoding the puzzle, the team found that during its «off» phase, the white dwarf’s accretion disc was spinning so fast it induced a centrifugal force strong enough to prevent the disc’s matter from ever reaching the central star. That’s why the expiring stellar object didn’t have anything to gobble on, thereby limiting its light. Such regulation, according to the research, is called magnetic gating.

The phenomenon is similar to what happens when you ride a roller coaster and enter a loop. A rider wouldn’t fall into the loop due to the force that presses the passengers into their seats.

After the «off» phase and during the «on» phase, the disc’s speed of rotation went back to normal. Matter could, once again, escape the grips of the spin for the white dwarf to snack on.

«This really is a previously unrecognized phenomenon,» Scaringi explained, adding that «because we can draw comparisons with similar behavior in the much smaller neutron stars, it could be an important step in helping us to better understand the process of how other accreting objects feed on the material that surrounds them, and the important role of magnetic fields in this process.»

Technologies

Spotify Brings Wrapped Energy Year-Round With Friend-Sharing Stats

The music service introduced new ways for music nerds to share their listening habits with friends.

It can be a long wait for Spotify Wrapped, the end-of-year promotion that allows Spotify users to view and share their listening habits. Now, users can keep an eye on those stats daily, plus share their listening habits with friends.

You can view your Spotify usage statistics every 24 hours and share your updates via social media services, such as Instagram Notes or Spotify Messages. The new share icon gives you access to eight different services where you can post your stats.

Every week, you’ll get updates on your top artists and songs from the past month, and Spotify will recommend new playlists. The app also gives you a «special highlight» based on a specific artist or song.

To access your personal musical data, click on your profile in the top left corner of the app and scroll down to «listening stats.»

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The new features are somewhat similar to Spotify Wrapped, the service’s annual end-of-year review of users’ listening habits, which is designed to be shared. Every year, Spotify adds extra details to Wrapped, such as assigning users a listening personality or a city that supposedly reflects their music tastes. It’s been the most popular way for Spotify users to view and share their music listening in the past. A number of third-party services do the same thing, including Volt.fm.

Read more: Best Music Streaming Services

Spotify is the world’s largest music streaming service, offering 100 million tracks and serving more than 713 million users. In addition to its $12-per-month subscription service, Spotify also offers a free, ad-supported option.

Technologies

Wordle Gets Personal: You Can Now Make and Share Your Own Puzzles

If you’re a Wordle obsessive, you can now make your own inside joke puzzles to send to friends.

Wordle’s an immensely popular New York Times word game (we post the answers daily), but it’s not the most personal game in the world. Answers such as GUISE and PERIL are tricky, but generic. Now, Wordle fans who have ever dreamed of making their own puzzles can test their friends and family by creating their own Wordle creations up to seven letters in length.

No surprise, you have to be a New York Times Games or All Access Subscriber to use this feature. If you are, you’ll find the Create a Puzzle option available from the top menu above today’s Wordle. While you must be a subscriber to create your own personalized puzzle, you can share it with anyone — they only need the link, not a subscription, to complete your Wordle.

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Enter a word, and the site will tell you if it is available. Real Wordle limits you to five-letter words, but the puzzle-making feature lets you choose words between 4 and 7 letters.

The usual dictionary rules apply, and so curse words, some pet names, and obscure inside jokes are essentially out. If your cat is named TANGO, that’s there, but RINGO is not an option. You can drop a proposal with a single word like MARRY, but MARRYME will get rejected since that’s two separate words.

Word chosen, you can then fill out your name and add an optional hint, and the feature will generate your puzzle with a link you can send around. Unlike standard puzzles, your puzzle doesn’t appear to reset after a day, so whoever you send it to doesn’t need to rush to solve it.

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

Technologies

Today’s NYT Connections: Sports Edition Hints and Answers for Nov. 8, #411

Here are hints and the answers for the NYT Connections: Sports Edition puzzle No. 411 for Saturday, Nov. 8.

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

Today’s Connections: Sports Edition is a tricky one. The theme of the purple category is also a word hidden among the answers, but of course, it doesn’t end up in the purple group. If you’re struggling but still want to solve it, read on for hints and the answers.

Connections: Sports Edition is published by The Athletic, the subscription-based sports journalism site owned by the Times. It doesn’t show up in the NYT Games app but appears in The Athletic’s own app. Or you can play it for free online.

Read more: NYT Connections: Sports Edition Puzzle Comes Out of Beta

Hints for today’s Connections: Sports Edition groups

Here are four hints for the groupings in today’s Connections: Sports Edition puzzle, ranked from the easiest yellow group to the tough (and sometimes bizarre) purple group.

Yellow group hint: Brawl.

Green group hint: The Steel City.

Blue group hint: They once played in Oakland.

Purple group hint: Not always made of cardboard.