 |
|
|
|||||
The James Webb Space Telescope's Near-Infrared Camera (NIRCam) captured a curious sight in a region 3.6 billion light-years away from Earth: A supernova that appears three times, at three different periods during its explosion, in one image. More importantly, this image could help scientists better understand how fast the universe is expanding. A team of researchers chose to observe the galaxy cluster PLCK G165.7+67.0, also known as G165, for its high star rate formation that also leads to higher supernova rates. One image, which you can see above, captures what looks to be a streak of light with three distinct dots that appear brighter than the rest of it. As Dr. Brenda Frye from the University of Arizona explained, those dots correspond to an exploding white dwarf star. It is also gravitationally lensed that is, there's a cluster of galaxies between us and the star that served as a lens, bending the supernova's light into multiple images. Frye likened it to a trifold mirror that shows a different image of the person sitting in front of it. To note, it is the most distant Type Ia supernova, which is a supernova that occurs in a binary system, observed to date. Because of that cluster of galaxies in front of the supernova, light from the explosion travelled three different paths, each with a different length. That means the Webb telescope was able to capture different periods of its explosion in one image: Early into the event, mid-way through and near the end of it. Trifold supernova images are special, Frye said, because the "time delays, supernova distance, and gravitational lensing properties yield a value for the Hubble constant or H0 (pronounced H-naught)." NASA describes the Hubble constant as the number that characterizes the present-day expansion rate of the universe, which, in turn, could tell us more about the universe's age and history. Scientists have yet to agree on its exact value, and the team is hoping that this supernova image could provide some clarity. "The supernova was named SN H0pe since it gives astronomers hope to better understand the universe's changing expansion rate," Frye said. Wendy Freedman from the University of Chicago led a team in 2001 that found a value of 72. Other teams put the Hubble constant between 69.8 and 74 kilometers per second per megaparsec. Meanwhile, this team reported a value of 75.4, plus 8.1 or minus 5.5. "Our teams results are impactful: The Hubble constant value matches other measurements in the local universe, and is somewhat in tension with values obtained when the universe was young," Frye said. The supernova and the Hubble constant value derived from it need for be explored further, however, and the team expects future observations to "improve on the uncertainties" for a more accurate computation. This article originally appeared on Engadget at https://www.engadget.com/science/space/nasas-latest-supernova-image-could-tell-us-how-fast-the-universe-is-expanding-130005672.html?src=rss
Category:
Marketing and Advertising
Soon after launching AI playlists in the US, Spotify is adding a new way to keep the music going when you lose your internet connection. The new Offline Backup feature for iOS and Android automatically creates a playlist of your queued and recently played tracks, ready for listening on flights or off-the-grid excursions. Offline Backup is for Premium users only. The feature complements Spotifys existing offline mode for user-triggered downloads. In contrast, the Offline Backup playlist doesnt require any manual downloads. So, think of it as more preparation with less planning. (And, of course, the standard offline mode will still be there.) Spotify says the playlist will evolve, learning your habits as you continue to listen. It will also include the tracks already cached on your device from regular use. Spotify Once you go offline, the Offline Backup playlist will appear automatically in your Home feed. Once it populates, you can filter and sort songs within it to more easily nail down the artist, genre or vibe youre feeling. Spotify also lets you add the playlist to your library for easier access. Youll need to turn it on manually to start using the feature. Youll find it under Data Saving and Offline or Storage in the Spotify apps settings. Turn on the toggle for Offline Listening to activate Offline Backup. Offline Backup is available now for Spotify Premium subscribers globally. (And youll need to have listened to five songs or more recently.) If you dont see it after toggling it on and going offline, the company recommends checking for updates to the Spotify app.This article originally appeared on Engadget at https://www.engadget.com/apps/spotify-can-now-automatically-create-a-playlist-for-airplane-mode-120038259.html?src=rss
Category:
Marketing and Advertising
Ouras next-gen ring appears to be an upgrade in every way. It features a sleeker design, longer battery life and smarter sensors to offer deeper insights for wearers. No more squarish edges; its a perfect ring this time. Oura says Ring 4 has 18 signal pathways, up from eight in the Gen3, which is paired with its new Smart Sensing algorithm. Oura New features include automatic heart rate and activity detection for up to 40 activities. Itll land in six colors: Silver, Brushed Silver, Gold, Rose Gold, Stealth and Black. All bar the Stealth is made of titanium. Oura Ring 4 is available to pre-order today, with shipping expected to begin on October 15, 2024. Prices start at $349. Mat Smith The biggest stories you might have missed OpenAI rakes in over $6 billion in new funding Bose QuietComfort Earbuds review: A more affordable ANC ace Amazon tablets are getting AI tools, like writing assist and website summaries Students used Meta's smart glasses to automatically dox strangers Through an Instagram stream and publicly available information. Two Harvard students used facial recognition tech and a large language model to unearth a subjects name, occupation and other details. Their setup (dubbed I-XRAY) can use that information to pull data like addresses, phone numbers, family member details and partial social security numbers from various sources online. In a demo video, AnhPhu Nguyen and Caine Ardayfio used the glasses to address people who appear to be strangers by name, discuss their work and bring up a place where they may have met in the past, based on information picked up. The students told 404 Media they developed I-XRAY to make people aware of whats possible with current technology they wont release the code they used. Continue reading. Polestar 3 first drive The long-awaited SUV is finally here. Engadget Following its first two cars of the same name, the Polestar 3 delivers what many of us were looking for. Its a mass-market machine to fill the needs and wants of buyers looking for an all-electric SUV with proper dimensions and yellow seat belts. After all the delays, weve got a test drive. Continue reading. Tesla stops selling its cheapest car The new minimum price for a Model 3 is $42,500. Teslas Model 3 Standard Range Rear-Wheel Drive is no longer available in its online configurator. Electrek first reported on the absence of the cheapest option from the electric vehicle brand, with a price tag of $39,000. Now the Model 3 with Long-Range Rear-Wheel Drive takes that title with a retail price of $42,500. Continue reading.This article originally appeared on Engadget at https://www.engadget.com/general/the-morning-after-ouras-return-to-the-smart-ring-fight-111642885.html?src=rss
Category:
Marketing and Advertising
All news |
||||||||||||||||||
|
||||||||||||||||||