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Webb Finds Potentially Habitable Exoplanet Might Be an Ocean World

NASA’s James Webb Space Telescope paints an enthralling picture of a planet that could be a prime place to look for evidence of life.

The next time you gaze at the Leo constellation, take a moment to contemplate K2-18 b, a fascinating planet there that has scientists wondering if it could harbor life. New data from the James Webb Space Telescope gives us a scintillating vision of an exoplanet that may be covered in a liquid water ocean.

K2-18 b gets its name from host star K2-18, which is located about 120 light-years from us. That’s not terribly far in space terms, but we won’t be popping over there for an in-person visit anytime soon. K2-18 b orbits in the habitable zone of its star, a region where liquid water could be present on the planet. The exoplanet may be what’s known as a Hycean world, one that is covered in water with a hydrogen-rich atmosphere. The name is a combination of «hydrogen» and «ocean.» 

Astronomers from the University of Cambridge identified Hycean planets as a new class of habitable planet in 2021. The researchers encouraged investigating these worlds for biosignatures — evidence of life — as we continue our search for life beyond Earth. 

«Traditionally, the search for life on exoplanets has focused primarily on smaller rocky planets, but the larger Hycean worlds are significantly more conducive to atmospheric observations,» said University of Cambridge astronomer Nikku Madhusudhan, lead author of a paper on the Webb results (PDF). This is where Webb’s powerful instruments come in.

Webb is building off observations made by the venerable Hubble Space Telescope. Hubble already discovered water vapor in the atmosphere of K2-18 b. Webb has now detected carbon-bearing molecules methane and carbon dioxide in K2-18 b’s atmosphere. NASA said the detection of those molecules combined with a shortage of ammonia supports the idea the planet is hiding an ocean under its atmosphere.

Methane and carbon dioxide aren’t the only molecules worth getting excited about. The telescope may also have detected dimethyl sulfide, but follow-up work from Webb will be needed to confirm it. «On Earth, this is only produced by life. The bulk of the DMS in Earth’s atmosphere is emitted from phytoplankton in marine environments,» said NASA.    

Hubble and James Webb Space Telescope Images Compared: See the Difference

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K2-18 bis 8.6 times as massive as Earth, but it’s less massive than Neptune. We have nothing quite like it in our own solar system. «This lack of equivalent nearby planets means that these ‘sub-Neptunes’ are poorly understood, and the nature of their atmospheres is a matter of active debate among astronomers,» said NASA. 

Webb’s data so far is a reason for excitement about K2-18 b and its potential to host life, but it’s too soon to celebrate. NASA cautions that an ocean on a planet like this might be too hot to be habitable.

Webb is a joint project from NASA, the European Space Agency and the Canadian Space Agency. It launched in 2021 and has already reshaped our understanding of the universe in the short time it’s been in service. The early Webb data on K2-18 b is just the beginning. Researchers will use Webb to scrutinize the planet to better understand its atmosphere and potential for habitability.

«Our ultimate goal is the identification of life on a habitable exoplanet, which would transform our understanding of our place in the universe,» said Madhusudhan. 

Technologies

Facebook Brings Back Local Job Listings: How to Apply

One of Facebook’s most practical features from 2022 is being revived by Meta.

On the hunt for work? A Local Jobs search is being rolled out by Meta to make it easier for people in the US to discover and apply for nearby work directly on Facebook. The feature is inside Facebook Marketplace, Groups and Pages, Meta said last week, letting employers post openings and job seekers filter roles by distance, category or employment type.

You can apply or message employers directly through Facebook Messenger, while employers can publish job listings with just a few taps — similar to how you would post items for sale on Marketplace.


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Facebook offered a Jobs feature before discontinuing it in 2022, pushing business hiring toward its other platforms. Its return suggests Meta is attempting to expand Facebook’s usefulness beyond social networking and to position it once again as a hub for community-driven opportunities.

Read more: Meta’s All In on AI Creating the Ads You See on Instagram, Facebook and WhatsApp

«We’ve always been about connecting with people, whether through shared interests or key life events,» the press release states. «Now, if you’re looking for entry-level, trade and service industry employment in your community, Facebook can help you connect with local people and small businesses who are hiring.»

Read more: What Is Meta AI? Everything to Know About These AI Tools

How to get started with Local Jobs on Facebook

According to Meta, Local Jobs will appear as a dedicated section in Facebook Marketplace starting this week. If you’re 18 or older, you can:

  • Tap the Marketplace tab on the Facebook app or website.
  • Select Jobs to browse available positions nearby.
  • Use filters for job type, category and distance.
  • Tap Apply or message the employer directly via Messenger.

Businesses and page admins can post jobs by creating a new listing in Marketplace or from their Facebook Page. Listings can include job details, pay range, and scheduling information and will appear in local searches automatically.

The Local Jobs feature is rolling out across the US now, with Meta saying it plans to expand it in the months ahead.

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Technologies

Tesla Has a New Range of Affordable Electric Cars: How Much They Cost

The new, stripped-back versions of the Model Y and Model 3 have a more affordable starting price.

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Technologies

Today’s NYT Strands Hints, Answers and Help for Oct. 22 #598

Here are hints and answers for the NYT Strands puzzle for Oct. 22, No. 598.

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 a fun one — I definitely have at least two of these in my house. Some of the answers are a bit tough 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: Catch all.

If that doesn’t help you, here’s a clue: A mess of items.

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:

  • BATE, LICE, SLUM, CAPE, HOLE, CARE, BARE, THEN, SLAM, SAMBA, BACK

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:

  • TAPE, COIN, PENCIL, BATTERY, SHOELACE, THUMBTACK

Today’s Strands spangram

Today’s Strands spangram is JUNKDRAWER. To find it, look for the J that’s five letters down on the far-left row, and wind down, over and then up.

Quick tips for Strands

#1: To get more clue words, see if you can tweak the words you’ve already found, by adding an «S» or other variants. And if you find a word like WILL, see if other letters are close enough to help you make SILL, or BILL.

#2: Once you get one theme word, look at the puzzle to see if you can spot other related words.

#3: If you’ve been given the letters for a theme word, but can’t figure it out, guess three more clue words, and the puzzle will light up each letter in order, revealing the word.

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