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Astronomers discover less metallic star system in the Milky Way



Astronomers discover less metallic star system in the Milky Way

The structure found in the Milky Way has a lower proportion of heavy elements than any other. star system known in our galaxy… Discovery described in a scientific article published this Wednesday (5) in the journal Naturewas made through the Gemini Observatory, a program of the US National Optical Infrared Astronomy Research Laboratory (NOIRLab).

According to observations, the stars in this stream were detached from the ancient star cluster and are relics of the early days of the Milky Way, which may provide data on the formation of the first stars.


An international team of researchers, including members of the European Union, Canada and Russia, is responsible for the discovery of C-19, the so-called stellar stream south of the Milky Way. Its orbit extends about 20,000 light years from the galactic center at its closest point and about 90,000 light years from the farthest point.

This stellar stream, known as C-19, covers a large area of ​​the night sky, about 30 times the width of the full moon.

The star system covers an area equivalent to 30 full moons in the Milky Way.

According to scientists, the star system occupies an impressive area in the night sky – about 30 times the width. Key – although not visible to the naked eye.

Using the Gemini North Telescope in Hawaii and the Gemini Remote Access to CFHT SPADES Spectrograph (GRACES) instrument, both from the Gemini Observatory, the team realized that C-19 was the remnant of a globular cluster.

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Globular clusters were previously thought to contain at least 0.2% metal, but C-19 has an unprecedented level of less than 0.05% metallicity.

The discovery that a weak metallic flux arises from a globular cluster has implications for star formation. clusters stars and galaxies in the early universe.

The animation shows how a globular star cluster orbiting a galaxy still forming the Milky Way could have been torn apart by the gravity of an evolving galaxy and become C-19 stellar stream.

In fact, the very existence of this stream indicates that globular clusters and the first building blocks of the Milky Way must have formed in a low-metal environment before successive generations of stars supplied the universe with heavier elements.

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“It is not known if globular clusters exist with so few heavy elements. Some theories even suggested that they could not have formed, ”commented Nicholas Martin of the Astronomical Observatory in Strasbourg, the main author of the study. “Other theories suggest that they all disappeared long ago, making this a fundamental discovery for our understanding of how stars formed in the early universe.”

The team members originally detected C-19 in data from the Gaia satellite using an algorithm they developed specifically to detect stellar streams. The stars in C-19 were also identified by the Pristine Survey – a search for the least metallic stars in and around the Milky Way with the Canada-France-Hawaii telescope – as interesting enough to warrant follow-up observations.

The distribution of very dense groups of stars in the Milky Way, called globular clusters, is superimposed on a galaxy map compiled from data from the Gaia satellite. Each point represents a cluster of several thousand to several million stars. The color of the dots shows their metallicity, that is, the content of heavy elements in them relative to the Sun. The C-19 stars are marked with blue symbols. Credit: N. Martin / Astronomical Observatory of Strasbourg / CNRS; Telescope Canada-France-Hawaii / Coelum; ESA / Gaia / DPAC

To determine the origin of the stars that make up C-19, astronomers needed detailed GRACES spectra. The team also collected data using a spectrograph installed at the Gran Telescopio Canarias in La Palma, Canary Islands.

“GRACES provided important clues to the fact that C-19 is a discontinuous globular cluster rather than a more ordinary interrupted dwarf galaxy,” explained Kim Venn of the University of Victoria, principal investigator of the GRACES observations. “We already knew that this was a very low metal stream, but identifying it as a globular cluster required the precision of metallicity and detailed chemistry available only with high resolution spectra.”

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The new study also suggests that C-19 must have formed from very early generations of stars, making the cluster a remarkable relic from when the first star clusters formed.

Consequently, this discovery improves our understanding of the formation of stars and star clusters that emerged shortly after the Big Bang, and provides a natural laboratory for studying the oldest structures in galaxies.

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‘My power is really low’: NASA’s Mars Insight rover prepares to launch from the Red Planet



NASA Lander InSight He has delivered what may be his last message from Mars as he embarks on a historic mission to uncover the secrets of the Red Planet’s interior.

In November, the space agency warned that the probe could be running out of time as dust continued to condense and stifle InSight’s power.

“Spacecraft power generation continues to decline as windblown dust accumulates on solar panels,” NASA said in a statement. Update November 2. “The end is expected to come in the coming weeks.”

message shared NASA The InSight Twitter account tweeted on Monday: “My power is very low so this might be the last photo I can upload. Don’t worry about me: my time here has been productive and uneventful. If I can keep talking to my mission team, I will—but I will.” Subscribe here soon. Thank you for staying with me.”

My power is very low, so this might be the last photo I can upload. But don’t worry about me: my time here has been productive and uneventful. If I can keep talking to my mission team, I will, but I’ll sign here soon. Thank you for staying with me.

— NASA InSight (@NASAInSight) December 19, 2022

A geologist robot armed with a hammer and a seismograph first reached the barren expanse of Elysium Planitia in November 2018.

Since then, she has carried out geological excavations, taking the first measurements of earthquakes with a high-tech seismometer placed right on the surface of Mars.

Last month, the solar-powered car released an update to remind us of its time in space.

“I was lucky to live on two planets. Four years ago I made it safely to the second one, much to the joy of my family at first. Thanks to my team for taking me on this journey of discovery. I hope I can be proud of you.”

According to the published mission, Insight has measured more than 1,300 seismic events since it was published, and more than 50 of them had signals clear enough for the team to extract information about their location on Mars. Results.

The probe’s data also provided detailed information about Mars’ interior, liquid core, surprisingly variable remnants beneath the surface of an extinct magnetic field, climate and seismic activity.

old for Its launch in 2018NASA Chief Scientist Jim Green said the mission was “fundamental to understanding the origins of our solar system and how it became what it is today.”

NASA will not declare the mission complete until Insight confirms the arrival of two spacecraft orbiting Mars that are relaying their information back to Earth.

In 2018, the veteran rover announced the capabilities end of his 15 year stay Sending an incomplete photo of the Valley of Perseverance.

A severe dust storm darkened the sky around the solar-powered rover, shattering the sun and leaving behind a dark image with white spots due to camera noise. The transmission is interrupted before the complete image can be transmitted.

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What’s new on February 7, 2023



OnePlus 11 5G Buds Pro 2 evento

Being very close companies, OPPO and OnePlus have decided to create a new partnership, with the latter being a pioneer in the market. It has become the representative of the best smartphones in the group, and this will be seen very soon.

Proving this, OnePlus has announced that it will have news soon. The following brand assets will be announced on February 7, 2023. We are talking about OnePlus 11 5G and Buds Pro 2.

In recent years, OnePlus has been showcasing new hardware in an attempt to find a new place in the market. The brand has not always seen its full potential, betting on mid-range or entry-level smartphones.

The situation is changing, and the novelty will go on sale in early 2023, February 7. It is on this day that the new OnePlus 11 5G will be presented with all the expected news. We definitely have the new Qualcomm Snapdragon 8 Gen 2 SoC here. There's still 16GB of storage left and 256GB of onboard storage.

OnePlus 11 5G Buds Pro 2 events

It is expected that he will receive a 6.7-inch OLED display with a resolution of 1440p and a frequency of 120 Hz. In the field of photography, we will have an important change: a 50 MP main camera, a 48 MP ultra wide-angle camera and a 32 MP telephoto lens with 2x zoom. For selfies and video calls, you'll have a 16-megapixel camera.

The photography partnership with Hasselblad will continue with OnePlus for fine-tuning and some additions. This alliance has brought important results for the best smartphones of the brand, guaranteeing the best photos in any situation.

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OnePlus 11 5G Buds Pro 2 events

In addition to the new OnePlus 11 5G, another brand new feature is also expected to arrive at the event. We're talking about the Buds Pro 2, which are solidifying an audio commitment that's becoming more of a reality. The brand promises "rich stereo quality sound with crystal clear clarity".

Stays like this marked by the beginning of February, another important novelty will enter the market. OnePlus wants to reclaim its place, and that will be the brand's bet for years to come. OnePlus 11 5G and Buds Pro 2 take the first step in this direction.

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New POCO Smartphone Seen in Certification May Debut Soon



New POCO Smartphone Seen in Certification May Debut Soon

According to information provided by Mukul Sharma, the unidentified POCO device can be identified by the model number 22127PC95I. Due to the fact that it was first seen online, the marketing name of this equipment is still a mystery.

POCO has not launched new mobile devices, including smartphones, to the market for some time now. On the other hand, several POCO smartphones such as POKO X5 and X5 Pro have been spotted on various certification sites, suggesting that the company will release these products soon. Today a new smartphone from the sub-brand xiaomi has been spotted on the BIS India website but the device does not have a name or any other details associated with it.

According to information provided by Mukul Sharma, the unidentified POCO device can be identified by the model number 22127PC95I. Due to the fact that it was first seen online, the marketing name of this equipment is still a mystery. It is possible that it will debut as a mid-range smartphone. The Bureau of Indian Standards (BIS) website, other than the model number of the smartphone, does not provide any additional information about the device. However, this seems to indicate that the product will be available in the Indian market very soon.

In other related news, POCO X5 5G has recently been seen on several certification sites including SIRIM in Malaysia, BIS in India and the US FCC. According to various sources, it is possible that this is a renamed or modified version Redmi Note 12 5Gwhich was recently released in China.

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It is supposed to be equipped screen 6.67″ AMOLED display with 120Hz refresh rate and chipset Snapdragon 4 Gen 1 inside. Can run MIUI 13 based on android 12 and have LPDDR4x RAM in addition to UFS 2.2 storage. The front camera is rumored to be 8MP while the main rear camera will be 48MP with 2MP depth. May have the ability drums 5000 mAh and 33W fast charging support.

In addition POCO X5 Pro 5G has recently been seen on various sites dedicated to certification. The battery is said to have a capacity of 5000 mAh and can charge at 67W. It will come with MIUI 14 preinstalled and will support n5, n7, n38, n41, n77 and n78 network bands. 5G.

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