Technologies

Saturn’s rings reveal a fuzzy, sloshy core lurks within the planet

NASA’s dearly-departed Cassini spacecraft helps scientists study Saturn’s insides.

We can’t send a spacecraft into the belly of the gas giant planet Saturn (well, at least, not one that survives), so sorting out what’s going on in there requires some clever science work. By examining Saturn’s famous rings, a team of researchers has made new discoveries about the planet’s interior.

Some theories suggested Saturn’s core might be a ball of rock, but a study published in the journal Nature Astronomy this week reveals what’s likely «a diffuse soup of ice, rock, and metallic fluids» called a «fuzzy» core.

«The analysis also reveals that the core extends across 60% of the planet’s diameter, which makes it substantially larger than previously estimated,» the California Institute of Technology said in a statement on Monday.

The researchers used data from NASA’s dearly departed, Saturn-studying spacecraft Cassini to make the discoveries. The team focused on ripples in the rings that are caused by a jiggling of the planet’s interior. Caltech likened this concept to that of earthquakes causing our own planet to rumble.

Astronomers have been aware for decades of how Saturn’s jiggling might affect its rings, and the new study brings this idea into sharper focus. «We used Saturn’s rings like a giant seismograph to measure oscillations inside the planet,» said Caltech astrophysicist Jim Fuller, a co-author. «This is the first time we’ve been able to seismically probe the structure of a gas giant planet, and the results were pretty surprising.»

Saturn might have a sloshy belly, but the team thinks it has stable layers with heavier materials in the middle. «The fuzzy cores are like a sludge. The hydrogen and helium gas in the planet gradually mix with more and more ice and rock as you move toward the planet’s center,» said lead author and planetary scientist Christopher Mankovich.

The Saturn findings could help us understand more about what’s going on inside Jupiter, also a gas giant planet. It could also advance ideas about how gas giants form.

NASA’s Cassini spacecraft plunged to its destruction in 2017 at the end of its mission, but it left us with many years worth of data on Saturn, its rings and its moons. As this new study shows, it wasn’t all about the gorgeous exterior views. Cassini’s journey has reached all the way to the very center of the planet.

Technologies

Skip Your iPhone’s Lockscreen: Here’s the Hidden Flashlight Trick You Need to Know

A couple of taps can really make a difference on your iPhone.

Not long ago, your iPhone’s lockscreen would only allow two app shortcuts that you couldn’t change: camera controls and a flashlight toggle. However, iOS 18.2 allows you to customize these shortcuts to almost anything you might want. This small but impactful change is one of many ways iOS 18 supercharges customization for iPhone and iPad users. But what if you still want an easy-to-access way to toggle your flashlight without unlocking your phone?

Apple introduced an accessibility feature in iOS 14 that, once enabled, allows you to perform actions by just tapping on the back of your phone. The feature is called Tap Back and it remains a sleeper feature that’s sneakily hidden away in your settings menu. Enabling Tap Back essentially allows you to create a button on the back of your iPhone to perform an action without needing to take up any space.

Once you have Tap Back enabled, it doesn’t take long to see how much of a game-changer it can be with its added convenience. Below, we’ll show you how to set it up so a couple of taps on the back of your iPhone will let you launch just about anything you want.

For more, check out what’s in the latest iOS 18.4 release.

How to set up Back Tap on iPhone

Whether you want to link Back Tap with your flashlight, camera or launch a different iPhone app, the path through your iPhone settings begins the same way.

On your compatible iPhone (iPhone 8 or later), launch the Settings application and go to Accessibility > Touch > Back Tap. Now you have the option to launch your action (in this case, your flashlight) with either two or three taps. Although two taps is obviously faster, I would suggest three taps because if you fidget with your phone, it’s easy to accidentally trigger the accessibility feature.

Once you choose a tap option, select the Flashlight option — or a different action if you prefer. You’ll see over 30 options to choose from, including system options like Siri or taking a screenshot, to accessibility-specific functions like opening a magnifier or turning on real-time live captions. You can also set up Back Tap to open the Control Center, go back home, mute your audio, turn the volume up and down and run any shortcuts you’ve downloaded or created.

You’ll know you’ve successfully selected your choice when a blue checkmark appears to the right of the action. You could actually set up two shortcuts this way — one that’s triggered by two taps and one that’s triggered by three taps to the iPhone’s back cover.

Once you exit the Settings application, you can try out the newly enabled Back Tap feature by tapping the back of your iPhone — in my case, to turn on the flashlight. To turn off the flashlight, you can tap on the back of your iPhone as well, but you can also just turn it off from your lock screen if that’s easier.

For more great iPhone tips, here’s how to keep your iPhone screen from dimming all the time and canceling all those subscriptions you don’t want or need.

Technologies

All the Nintendo Games You Can Update to Switch 2 for Free

Bad news: Mario Kart World will cost $80. Good news: These classic games will get free revamped versions for Switch 2.

Nintendo’s Switch 2 launch event on Wednesday has upset some fans for one key reason: pricing. The new console will be released on June 5 at a starting price of $450, and it will have new games, like Mario Kart World, Kirby Air Riders and Donkey Kong Bananza. But those games could cost as much as $80 (and that’s before factoring in possible tariffs).

Fortunately, Nintendo has also announced that some Nintendo Switch games will get free updates to improve playability on the upcoming console.

«By connecting your Nintendo Switch 2 to the internet, you can download free updates that may improve performance or add support for features such as GameShare in select games,» the company posted.

Here are all the Nintendo Switch games that can get a free update for the Switch 2.

Nintendo also announced that other Switch games will have upgraded versions of the base game, called Switch 2 Editions. These games, which include The Legend of Zelda: Breath of the Wild and Tears of the Kingdom, may offer improved graphics, unique ways to play the game with the Switch 2 hardware, and other features.

You can buy a digital or physical copy of these games if you’re purchasing them for the first time. But Switch 2 Edition games are not free if you already own the Switch version of one of these games, so you’ll have to buy an upgrade pack to play the updated version.

It’s unclear how much Switch 2 Editions of games and upgrade packs will cost, and it’s also unclear how upgrade packs will work with physical versions of Switch games.

The Nintendo Switch 2 will also be backward compatible with certain games. While we don’t know all the Switch games that will be playable on the Switch 2, we know some Switch games have startup (PDF) or in-game (PDF) compatibility issues with the upcoming console.

For more on the Nintendo Switch 2 Direct, here’s what we know about the upcoming console and what to know about games like Mario Kart World and Duskbloods.

Technologies

Today’s NYT Mini Crossword Answers for Friday, April 4

Here are the answers for The New York Times Mini Crossword for April 4.

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 about knocked me out. I struggled with 1-Across, «Elphaba’s broom in ‘Wicked’ or Aladdin’s lamp in ‘Aladdin,’ thinking it was a word like «magic» but with one less letter. And I was also stumped by 4-Down, «kibble nibblers,» which I thought for sure was «dogs» or «pups.» 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: Elphaba’s broom in «Wicked» or Aladdin’s lamp in «Aladdin»
Answer: PROP

5A clue: Thorough investigation
Answer: PROBE

6A clue: Metaphor for an unquestioning rule-follower
Answer: ROBOT

7A clue: Harvard and Yale, for two
Answer: IVIES

8A clue: ___ Wearhouse (department store chain)
Answer: MENS

Mini down clues and answers

1D clue: Definitively determine
Answer: PROVE

2D clue: Herald of spring
Answer: ROBIN

3D clue: Orchestral reeds
Answer: OBOES

4D clue: Kibble nibblers
Answer: PETS

5D clue: Fastidiously proper
Answer: PRIM

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.