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

Google Is Bringing Gemini AI to Its Smart Home Lineup, Starting Oct. 1

Goodbye, Google Assistant. Hello, Gemini.

It increasingly feels like Google’s AI assistant is omnipresent across our devices and, starting next month, it could also be in your home.

In a post on X on Tuesday, the company teased, «Gemini is coming to Google Home,» and told us to, «Come back October 1.»

At its Made by Google event in August, the company announced Gemini for Home among a slew of other product announcements, so this has been in the works for a while.

Tuesday’s X post teaser appears to show an image of a Nest camera, which Google last upgraded four years ago, suggesting the security camera could be set for a refresh. An upgraded Nest speaker and doorbell, both with 2K camera support, could also be part of the Oct. 1 unveiling.

Google did not immediately respond to CNET’s request for comment.

Android Faithful podcast co-host (and former CNET staffer) Jason Howell is «optimistic» about Gemini replacing Assistant in Google’s smart home products.

«In recent years, I have witnessed my Google Home devices degrading in quality and becoming far less useful for even simple tasks and questions,» Howell tells CNET. «They’ve become buggy and unreliable to the point where I’ve stopped interacting with them for most things.»

Gemini catches dog red-handed

At the Mobile World Congress tech show in Barcelona earlier this year, Howell was impressed by Gemini’s performance with a smart home camera.

«A smart home camera detected a dog that came into the kitchen to steal a cookie off the counter,» Howell recalls. «Through voice interaction, the homeowner could ask the system what happened to the cookie, and, given the video context from the camera and an understanding of what it saw, the system could tell the homeowner that the dog was the culprit.

«This sort of example empowers users to spend less time looking for answers in lieu of simple voice queries that serve them the answer they are looking for with less effort and less time spent.»

Google announced last month that Gemini for Home will eventually replace Google Assistant in its smart home devices. You’ll still activate Gemini with, «Hey Google,» but the advanced AI tech will be able to better interpret more complex and nuanced instructions and questions.

Maybe you’re stumped as to what to make for dinner, so it could be: «Hey Google, what quick pasta dish can I cook in less than an hour?» or, «Give me a recipe for Caesar salad.» Gemini is also designed to work with thermostats and smart lights, so you might tell it to «turn the temp to 68 degrees» and «turn off all the lights except in the kitchen.»

The market for smart home technology is expected to grow by 23% over the next five years, according to Grand View Research.

Technologies

Polar Introduces Loop, a $200 Screenless Wearable

Polar’s first fitness tracker with no screen tracks activity, sleep and overall health, the company says.

Fitness tracking company Polar has launched Loop, a $200 screenless wearable that it says will have no subscription fees. Preorders opened on Sept. 3, and the Polar Loop will start shipping on Sept. 10.

Like other fitness trackers, the Polar Loop will log steps, sleep patterns and daily activity patterns but Polar is touting the lack of a screen as «unobtrusive» and «discreet.» The Loop, which is a wearable band for your wrist, has eight days of battery life with continuous use and stores four weeks’ worth of data. It syncs with the Polar Flow app to view stats and analyze sleep and training data, among other information.

Because it has no buttons, activities can be started in the app or passively with what the company calls «automatic training detection.»

It’s available in the colors Greige Sand, Night Black and Brown Copper. Additional band colors are offered for $20 each.

There’s already a market of no-screen wearables, including the Whoop 5.0 wristband and smart rings such as the Oura Ring 3.

Will the Loop measure up?

Whether the Polar Loop’s attempt at simplifying a fitness wearable works out will largely depend on how well it runs and what it offers compared to other devices.

«The company is clearly tapping into the growing demand for screen-free wearables,» says CNET’s lead writer for wearables, Vanessa Hand Orellana. «It feels like a direct answer to the athlete-favorite Whoop band and even the Oura Ring, both of which collect similar health metrics to display and analyze in their respective apps.»

Hand Orellana says Polar has a good reputation, with its signature heart-rate chest straps, and may win over fans by eschewing the subscription fee that the Oura and Whoop require.

«That said, as with most devices in this space, the real differentiator often comes down to execution… specifically, how well the data translates into clear, actionable insights. Personally, I’m curious to see how the Loop integrates with Polar’s app, which, at least in my experience with their HR straps, hasn’t always been the most intuitive to navigate,» she said.

Technologies

Waymo Is Expanding to Denver and Seattle. Everything to Know About the Robotaxi

The company has also been granted a permit to test its self-driving vehicles in New York City. Here’s everywhere Waymo operates now, and where it’s set to arrive soon.