Technology

An international team has just returned from Antarctica with a special loot: a 7.6 kg meteorite present on the ice for tens of thousands of years.

An international team led by Vinciane Debaille (FNRS-ULB) and composed of Maria Schönbächler (ETH-Zurich), maria valdes (Field Museum of Natural History-U. Chicago) et Ryoga Maeda (VUB-ULB), and guided by Manu Poudelet (International Polar Guide Association) has just returned from a reconnaissance mission in Antarctica to search for new areas of meteorite accumulation around the Station belge Princess Elisabeth Antarctica.

Among their research, they came across the blue ice zone by Nils Larsenregarding sixty kilometers from the station.

The team also found a 7.6 kg meteorite. This is a meteorite that comes from the asteroid belt which ended its race in the Antarctic blue ice, waiting tens of thousands of years to be discovered. “This is a relatively rare piece“, explains Vinciane Debaille. In effect, there are not many meteorites weighing several kilos depending on the sender.

“To prevent the ice from melting and water from entering the meteorite, the meteorites are currently in the freezer“, Vinciane Debaille continues.

The next step is to thaw collected meteorites at the Royal Institute of Natural Sciences of Belgium and at analyze them for a minimum of one month. “It is a primitive meteorite that will allow us to approach the birth of the solar system“.

■ Report by Mael Arnoldussen, Nicolas Scheenaerts and Hugo Moriamé

With the press releaseULB star

The vivo X90 Series was officially launched in China at the end of last year. And it is expected to launch globally early this year as well. Before this time, we knew that The entry-level vivo X90 has been certified by the NBTC. Recently, the senior vivo X90 Pro passed the NBTC as well!

The certified vivo X90 Pro is V2219, and this model has already passed Geekbench testing.

Geekbench confirms that the global version of the vivo X90 Pro will come with a MediaTek-powered Dimensity 9200 chipset and 12GB of RAM.

The rest of the specs of the vivo X90 Pro should be the same when it launched in China.

Vivo X90 Pro specifications summary

• 6.78-inch E6 AMOLED display
• Resolution 2800 x 1260 pixels
• Refresh Rate 120Hz
• Chipset MediaTek Dimesnity 9200 Octa Core, speed 3.05GHz
• RAM 8GB/12GB (LPDDR5X)
• Capacity 256GB/512GB (UFS4.0)
• 4870mAh battery
• 120W fast charging system
• 3 rear cameras
  • Main camera 50MP f/1.75
  • Ultra-Wide Angle 12MP f/2.0 camera
  • Portrait camera 50MP f/1.6
• Front camera 32MP f/2.45
• Operating system Android 13

Having been certified like this, I believe that you will soon see the launch event in Thailand for sure. According to previous news, the vivo X90 Series willGlobal launch on January 31st.Also, let’s wait and follow!

source : Gizmochina, NBTC

The breakdown of third-party Twitter clients in progress since Friday would in fact be intentional on the part of the social network which has remained silent so far.

Would Twitter have voluntarily cut off access to its API for third-party platforms such as Tweetbot, Twitterific or Echofron? Since Friday, users can no longer connect to these applications allowing them to browse Twitter while benefiting from advanced features, without going through the company application.

What looked like a bug at first glance turns out to be intentional on Twitter’s part. If the management of the company has not communicated on the subject, the specialized media The Information had access to internal Slack messages, attesting that this was indeed a deliberate act. “Third-party app suspensions are intentional,” clearly indicates a message from a dedicated channel for triaging service interruptions.

Silent Twitter

Many third-party developers attempted to reach Twitter. Without success. « We still have no news from Twitter. We’re honored that so many of you have chosen us as your way to navigate Twitter over the past 12 years and hope that can continue…” notably tweeted Tapbots. Already, some developers like Paul Haddad, co-founders of Tapbots and developer of Tweetbot have preferred to throw in the towel and have announced that they are focusing on launching offers on Mastodon.

What regarding the reasons for these access revocations? Twitter has remained silent so far. Nevertheless, still according to the sources of The Information, the company is working on an official communication. Things might still drag on a little, since since the arrival of Elon Musk at the head of the social network last October, the blue bird no longer has a communication team. Case to follow.

A research team headed by Chih-Chun Hsu, a postdoctoral researcher at Northwestern University, has discovered a new binary star consisting of two “ultracold dwarf stars”, which are small and have low temperatures. Presented at the 241st meeting.

Ultracool Dwarf Stars are red dwarf stars with an effective temperature of less than 3000 Kelvin (regarding 2730 degrees Celsius), close to the lower limits of stellar size and mass, and shine mainly in infrared wavelengths. The star “TRAPPIST-1”, where seven extrasolar planets have been found so far, is also counted as one of the ultracold dwarfs.

What was reported this time is the binary star LP 413-53AB in the direction of Taurus. As mentioned above, the binary is believed to be two ultracold dwarfs orbiting each other. Two stars are 0.01 AU（※1）They are only a few degrees apart, and their orbital periods (or “one year” in other words) are as short as 20.5 hours.

*1…1 astronomical unit (au) = approximately 150 million km, derived from the average distance from the sun to the earth.

According to Adam Burgasser, a professor at the University of California, San Diego, who participated in the study, since the orbital period of many binary stars is on the order of years, measurements are taken every few months and the data are analyzed following a certain period of time. increase.However, the observed data of LP 413-53AB changes every few minutes, and the spectral line（※2）It is said that it was possible to observe the shift in “real time”.

*2…A collective name for absorption lines and emission lines that appear in the spectrum (intensity of each wavelength of electromagnetic waves).

[▲ The current size (red) of the two ultracold dwarfs that make up LP 413-53AB and the estimated size (dotted line) around 1 million years following their formation (Credit: Adam Burgasser/University of California San Diego)]

LP 413-53AB is billions of years old, and it is believed that the size of the star soon following its birth was larger than it is now. “It’s amazing,” Hsu said of the distance between LP 413-53AB, which is only regarding 1 percent of the distance from the Sun to Earth. He points out that the stars would have overlapped. The researchers speculate that the two stars that make up LP 413-53AB may have approached each other in the course of their evolution, or they may have approached each other following the now-missing third star was ejected from the system. I’m here.

Also, in LP 413-53AB, the habitable zone happens to overlap the orbit of the binary star, so it is said that there is no planet in the habitable zone. Ultracold dwarfs are also estimated to make up 15 percent of the stars in the solar system’s vicinity, but if close binary stars, such as LP 413-53AB, are common among ultracold dwarfs, few habitable planets would be found. Hsu commented that it might not be. To investigate these scenarios for ultracold dwarf binaries, the research team hopes to identify more similar binaries.

Source

• Image Credit: Adam Burgasser/University of California San Diego
• Northwestern Now – Ultracool dwarf binary stars break records

Sentence/sorae editorial department