Technologies

Rare binary star, spotted for the first time, answers a long-standing question

This breakthrough could fill a gap in the stellar evolutionary timeline.

The universe is a star museum. Up close, we have our beloved sun in its middle age. Farther out, we’ll find white dwarfs nearing the end of their days. Peer deeper, and you’ll stumble upon hyper-dense neutron stars on the brink of turning into black holes. Now, for the first time, scientists have uncovered a star exhibit that, for years, has only been a hypothesis.

Technically, the team’s discovery is of a binary star system, or one star orbiting another. In this case, the smaller companion is eating the larger star, and very soon, the sparkly orb being chomped on will become a rare form of white dwarf, or late-stage star, called an extremely low mass, or ELM, white dwarf.

They’ve published a paper explaining their findings in this month’s issue of Monthly Notices of the Royal Astronomical Society.

Though fascinating in itself, the sighting of the deteriorating binary star could also fill an empty slot in a long-standing cosmic puzzle.

«This is exciting; it’s a missing evolutionary link in binary star formation models that we’ve been looking for,» Kareem El-Badry, lead author of the paper and a researcher from the Institute for Theory and Computation at the Harvard-Smithsonian Center for Astrophysics, said in a statement.

Zooming out from the binary star itself, El-Badry’s discovery fills a gap in our knowledge of how ELM white dwarfs are generated in the first place. We know ELM white dwarfs exist, as scientists have already pinpointed them, but these stellar bodies pose a conundrum.

According to astronomical calculations, experts say, for a star to naturally reach the mass of an ELM white dwarf, it would need to have been born over 13.8 billion years ago. The issue is, the universe itself is only 13.8 billion years old — so that doesn’t really make sense with what we know about the cosmos so far.

Therefore, the only way these stars could possibly be formed within the universe’s timeline is if an external force created them. That force, theorists say, could be the gravitational pull of a companion in a binary star system that’s pulling matter away from the other until the latter object becomes an ELM white dwarf. Seems intuitive, but for a long time, that was just a hypothesis.

Scientists have come upon binary star systems called cataclysmic variables where regular, massive stars are being consumed by a companion star. They’ve even recorded ELM white dwarfs with companions no longer consuming them. It’s easy to extrapolate that an intermediate step would involve an almost-ELM white dwarf with a companion star eating away at it, but no one had seen such a sight.

Thanks to El-Badry’s revelatory documentation, the transitional step appears to be proven at last.

Star hunting

El-Badry used a wide array of star data, several astronomical surveys and his own firsthand observations with the Shane Telescope at the Lick Observatory in California to locate the unique binary star. He’d come up with 50 potential candidates of transitional ELM white dwarfs and ultimately zeroed in on 21 options.

«100 percent of the candidates were these pre-ELMs we’d been looking for,» he explained in the statement. «They were more puffed up and bloated than ELMs. They also were egg-shaped because the gravitational pull of the other star distorts their spherical shape.»

Aptly, he compares the importance of this breakthrough to biological studies of organisms. «You go out into the jungle and find an organism. You describe how big it is, how much it weighs — and then you go on to some other organism,» he said. «You see all these different types of objects and need to piece together how they are all connected.»

Like the ever-advancing tree of life, El-Badry’s new evidence of ELM white dwarfs helps to unveil the entirety of our cosmic star gallery. «We found the evolutionary link between two classes of binary stars — cataclysmic variables and ELM white dwarfs — and we found a decent number of them,» he said.

Next, he hopes to delve into the other 29 pre-ELM white dwarf star candidates to enrich the universe’s star museum even further.

Technologies

Today’s NYT Connections Hints, Answers and Help for Jan. 16, #950

Here are some hints and the answers for the NYT Connections puzzle for Jan. 16 #950.

Looking for the most recent 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, Connections: Sports Edition and Strands puzzles.

Today’s NYT Connections puzzle has a very intriguing blue group. You’ll notice some band names, but can you locate what they have in common? Read on for clues and today’s Connections answers.

The Times has a Connections Bot, like the one for Wordle. Go there after you play to receive a numeric score and to have the program analyze your answers. Players who are registered with the Times Games section can now nerd out by following their progress, including the number of puzzles completed, win rate, number of times they nabbed a perfect score and their win streak.

Read more: Hints, Tips and Strategies to Help You Win at NYT Connections Every Time

Hints for today’s Connections groups

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

Yellow group hint: Worn on heads.

Green group hint: Nighty-night.

Blue group hint: Bands with something alphabet-related in common.

Purple group hint: Like great.

Answers for today’s Connections groups

Yellow group: Kinds of hats.

Green group: Components of a kid’s bedtime routine.

Blue group: Musical acts with «A» as the only vowel.

Purple group: Grand ____.

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

What are today’s Connections answers?

The yellow words in today’s Connections

The theme is kinds of hats. The four answers are derby, fedora, Panama and porkpie.

The green words in today’s Connections

The theme is components of a kid’s bedtime routine. The four answers are bath, brushing, pajamas and story.

The blue words in today’s Connections

The theme is musical acts with «A» as the only vowel. The four answers are Alabama, Bananarama, Kansas and Santana.

The purple words in today’s Connections

The theme is grand ____. The four answers are Bahama, Canyon, piano and slam.

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

Quick tips for Connections

#1: Say the clue words out loud, pausing before and after each. That helps you hear the words in the context of a phrase. The Connections editors love to group words together that are used in similar phrasing, like ____ Up.

#2: Don’t go for the obvious grouping. These editors are smart. Once, they offered SPONGE, BOB, SQUARE and PANTS in the same puzzle. None of those words were in the same category. If you like, hit the «shuffle» button to give yourself a different perspective on the words.

#3: Break down any compound words and look for similarities. «Rushmore» was once in a puzzle where the connection was that each word started with the name of a rock band.

Technologies

Today’s NYT Connections: Sports Edition Hints and Answers for Jan. 16, #480

Here are hints and the answers for the NYT Connections: Sports Edition puzzle for Jan. 16, No. 480.

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, with some odd words and bizarre categories. If you’re struggling with it 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: Don’t get hurt!

Green group hint: Exaggerated language.

Blue group hint: Ouch!

Purple group hint: Not northern.

Answers for today’s Connections: Sports Edition groups

Yellow group: Protective gear.

Green group: Hype.

Blue group: Sharp things.

Purple group: «Southern ____» schools.

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 protective gear. The four answers are gloves, helmet, mouth guard and shoulder pads.

The green words in today’s Connections

The theme is hype. The four answers are anticipation, ballyhoo, buildup and buzz.

The blue words in today’s Connections

The theme is sharp things. The four answers are dart, hairpin turn, ice skate and javelin.

The purple words in today’s Connections

The theme is «Southern ____» schools. The four answers are California, Illinois, Methodist and Miss.

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

Quick tips for Connections: Sports Edition

#1: Don’t grab for the easiest group. For each word, think about other sports categories it might fit in – is this a word that can be used in football, or to describe scoring options?

#2: Second meanings are important. The puzzle loves to use last names and even college names that mean other things, to fool you into thinking they are words, not names.

#3: And the opposite is also true. Words like HURTS might seem like a regular word, but it’s also the last name of at least one pro athlete.

Technologies

Today’s NYT Mini Crossword Answers for Friday, Jan. 16

Here are the answers for The New York Times Mini Crossword for Jan. 16.

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? I thought it was exceptionally tough today, and was convinced 1-Across was «MAD» Max. (Spoiler, it’s not.) I also figured 1-Down was BOOZE, which did not work with 1-Across, and was wrong either way. 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.