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

Today’s NYT Connections: Sports Edition Hints and Answers for Feb. 5, #500

Here are hints and the answers for the NYT Connections: Sports Edition puzzle for Feb. 5, No. 500.

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 tough one. As an old-school Minnesota Twins fan, I was excited to see the last name of our most legendary player on the grid. If you’re struggling with today’s puzzle 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 appear in the NYT Games app, but it does 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: QB is another one.

Green group hint: Hit it out of the park.

Blue group hint: Great gridiron signal-callers.

Purple group hint: Half of a thousand.

Answers for today’s Connections: Sports Edition groups

Yellow group: Football positions, abbreviated.

Green group: Members of the 500-HR club.

Blue group: First names of QBs to throw 500 career TDs.

Purple group: ____500.

Read more: Wordle Cheat Sheet: Here Are the Most Popular Letters Used in English Words

What are today’s Connections: Sports Edition answers?

The yellow words in today’s Connections

The theme is football positions, abbreviated. The four answers are CB, OT, S and TE.

The green words in today’s Connections

The theme is members of the 500-HR club. The four answers are Banks, Bonds, Foxx and Killebrew.

The blue words in today’s Connections

The theme is first names of QBs to throw 500 career TDs. The four answers are Aaron, Drew, Peyton and Tom.

The purple words in today’s Connections

The theme is ____500. The four answers are ATP, Daytona, Indy and WTA.

Don’t miss any of our unbiased tech content and lab-based reviews. Add CNET as a preferred Google source.

Technologies

Today’s NYT Mini Crossword Answers for Thursday, Feb. 5

Here are the answers for The New York Times Mini Crossword for Feb. 5

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? The Across clues were kind of tricky today, but the Down clues helped me fill in the grid. Read on for all the answers. 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.

Mini across clues and answers

1A clue: Battery warning from a smoke detector
Answer: CHIRP

6A clue: Word that can precede «book» or «tour»
Answer: AUDIO

7A clue: Extreme edge
Answer: BRINK

8A clue: Like a wobbly screw
Answer: LOOSE

9A clue: Type in
Answer: ENTER

Mini down clues and answers

1D clue: Alternative to streaming
Answer: CABLE

2D clue: One of the Great Lakes
Answer: HURON

3D clue: Dummy
Answer: IDIOT

4D clue: Wash under a tap
Answer: RINSE

5D clue: Game in which Paul Newman successfully cons a crime boss in «The Sting»
Answer: POKER

Technologies

Fitbit Launches Luffu, AI-Powered Health Tracking for the Whole Family

Soon, you may be able to access every family member’s health data in one place.

If you’ve ever wanted a way to keep all of your family’s health records in place, Fitbit may have come up with a solution. Fitbit, well-known for its fitness wearables, announced the launch of its own health care system on Wednesday.

Luffu, which translates to the Old English word for «love,» uses AI to create what it calls an «intelligent family care system.» The platform allows family members to share all their health information through an app.

It’s unclear when Luffu will be officially available, but you can sign up for the waitlist to get access to the limited public beta. Pricing or other details have not been announced.

Luffu will allow families to keep track of everyone’s doctor’s appointments, test results, vaccine records, medications, symptoms, diet and more. The platform uses AI to learn your family’s health history and patterns, and to alert you to any changes that should be addressed, such as missed medications or abnormal vitals. The AI function organizes the data submitted into the system. The app will also connect to third-party apps and wearables, such as the Fitbit.

Luffu is meant to lighten the mental load of family care by organizing all this health data in one place, its co-founder said.

«I was caring for my parents from across the country, trying to piece together my mom’s health care across various portals and providers, with a language barrier that made it hard to get a complete, timely context from her about doctor visits,» said Luffu co-founder James Park.

Luffu will include alerts and a space to log health and medication information via voice, text, photos, and other health portals and devices. The key medical information can be shared across the platform with spouses, caregivers and parents.

A representative for Fitbit did not immediately respond to a request for comment.