Get subscribed to our newsletter
Get interesting updates to your email inbox.
Observations made by a small spacecraft called HaloSat have shown that the Milky Way galaxy is surrounded by a clumpy halo of hot gases that are continually being supplied with material ejected by birthing or dying stars.
A halo is a large region filled with hot gas that surrounds a galaxy, also known as a “circumgalactic medium.”
The heated gaseous halo around the Milky Way was the incubator for the Milky Way’s formation some 13 billion years ago and could help solve a longstanding puzzle about where the missing matter of the universe might reside.
Follow NewsGram on Instagram to keep yourself updated.
In the new NASA-funded study published in the journal Nature Astronomy, the researchers concluded the circumgalactic medium has a disk-like geometry, based on the intensity of X-ray emissions coming from it.
“The X-ray emissions are stronger above the parts of the Milky Way where star formation is more vigorous,” said Philip Kaaret, Professor at the University of Iowa and corresponding author on the study.
“That suggests the circumgalactic medium is related to star formation, and it is likely we are seeing gas that previously fell into the Milky Way, made stars, and now is being recycled into the circumgalactic medium.”
Every galaxy has a circumgalactic medium, and these regions are crucial to understanding not only how galaxies formed and evolved but also how the universe progressed from a kernel of helium and hydrogen to a cosmological expanse teeming with stars, planets, comets, and all other sorts of celestial constituents.
HaloSat searches for the baryonic matter — that is, the same kind of particles that compose the visible world — believed to be missing since the universe’s birth.
The satellite has been observing the Milky Way’s circumgalactic medium for evidence that the missing baryonic matter may reside there.
Want to read more in Hindi? Checkout: देश के 45 सौ उद्योगों की चिमनियों में लगीं मशीन, 24 घंटे हो रही प्रदूषण की मॉनीटरिंग
Baryonic matter is distinct from dark matter, which is invisible and does not interact through any force except gravity. Scientists can only account for about two-thirds of the baryonic matter that should be present in the universe.
To look for the missing matter, Kaaret and his team wanted to get a better handle on the circumgalactic medium’s configuration.
More specifically, the researchers wanted to find out how big the circumgalactic medium really is.
If it is a huge, extended halo that is many times the size of our galaxy, it could house enough material to solve the missing baryonic question.
But if the circumgalactic medium is mostly comprised of recycled material, it would be a relatively thin, puffy layer of gas and an unlikely host of the missing baryonic matter.
“What we’ve done is definitely show that there’s a high-density part of the circumgalactic medium that’s bright in X-rays,” Kaaret says.
“But there still could be a really big, extended halo that is just dim in X-rays. And it might be harder to see that dim, extended halo because there’s this bright emission disk in the way.
“So it turns out with HaloSat alone, we really can’t say whether or not there really is this extended halo around the Milky Way,” Kaaret said.
Halat is a NASA CubeSat mission led by the University of Iowa. (IANS)
Hackers have stolen crypto tokens worth $120 million from Blockchain-based decentralised finance (DeFi) platform BadgerDAO. Several crypto wallets were drained before the platform could stop the cyber attack. In a tweet, Badger said it has received reports of unauthorised withdrawals of user funds. "As Badger engineers investigate this, all smart contracts have been paused to prevent further withdrawals. Our investigation is ongoing and we will release further information as soon as possible," the company said late on Thursday.
According to the blockchain security and data analytics Peckshield, the various tokens stolen in the attack are worth about $120 million, reports The Verge. According to reports, someone inserted a malicious script in the user interface (UI) of their website. Badger has retained data forensics experts Chainalysis to explore the full scale of the incident and authorities in both the US and Canada have been informed. "Badger is cooperating fully with external investigations as well as proceeding with its own," it said. DeFi is a collective term for financial products and services that are open, decentralised and accessible to anyone. DeFi products open up financial services to anyone with an internet connection and they are largely owned and maintained by their users. While the attack didn't reveal specific flaws within Blockchain tech itself, it managed to exploit the older "web 2.0" technology that most users need to use to perform transactions, according to reports. (IANS/ MBI)
(Keywords: crypto wallets, BadgerDAO, decentralised finance, Blockchain, 120 million, crypto tokens, Hackers)
A total of 120 top Bollywood and other celebrities are expected to attend the wedding of film stars Katrina Kaif and Vicky Kaushal which is scheduled on December 9 in Rajasthan, said Rajendra Kishan, the District Collector (DC) of Sawai Madhopur district of the state on Friday. The District Collector told mediapersons: "These 120 guests shall follow all COVID-19 protocols and fully vaccinated guests will get entry in the much-hyped celebrity wedding."
Kishan said that the organisers have been asked to strictly follow all Covid-19 protocols. Also, those who are not vaccinated, will not be allowed without the negative RT-PCR test report, he added. "We have been informed by organisers that a total of 120 guests are invited to the wedding and the events will take place between December 7 to December 10," he added.
Earlier at 10.30 a.m., Kishan called a meeting which was attended by administrative, police and forest department officials, hotel and event managers to ensure adequate arrangements for crowd control, smooth regulation of traffic, and law and order situation amid the VIP movement. The wedding venue Fort Barwara, that has been converted into a heritage hotel, is situated in the panchayat samiti Chauth Ka Barwara. The venue is around 22 km away from Sawai Madhopur and is around 174 km from Jaipur. Sawai Madhopur district is famous for the Ranthambore National Tiger Reserve and as per reports, the guests are likely to be taken for a tiger safari. (IANS/ MBI)
(Keywords: Rajasthan, December 9, Vicky Kaushal, Katrina Kaif, film stars, celebrities, Bollywood, Katrina-Vicky)
The National Centre for Biological Sciences (NCBS), which confirmed the first two cases of the Omicron variant in Bengaluru on Thursday, is continuously monitoring the situation in four cities - Bengaluru, Hyderabad, New Delhi, and Pune. The NCBS is a part of a consortium of national laboratories performing genomic surveillance across four city clusters. The consortium was established four months ago with support from The Rockefeller Foundation's Pandemic Prevention Institute, and is led by the Centre for Cellular and Molecular Biology (CCMB) in Hyderabad.
Dr Rakesh Mishra at the CCMB said on Friday that the consortium is continuously monitoring the situation in all the four cities and has upscaled its efforts to sequence as many samples as possible Apart from the CCMB and the NCBS, the consortium includes CSIR-Institute of Genomics and Integrative Biology - IGIB in New Delhi and the Pune Knowledge Cluster, Indian Institute of Science Education and Research (IISER), Pune, and CSIR-National Chemical Laboratory in Pune.
The first case of the Omicron variant was detected in South Africa and reported to the World Health Organization on November 24. | Unsplash
The consortium is focused on upscaling genomic surveillance as part of national efforts led by the INSACOG - Indian SARS-CoV-2 Genomics Consortium - to respond to the Covid-19 pandemic. The consortium intensified its sequencing efforts after the World Health Organisation announced Omicron as a Variant of Concern. Such an intensified effort enabled the Bengaluru team at the NCBS, a member laboratory of INSACOG, in collaboration with Strand Life Sciences and the Bruhat Bengaluru Mahanagara Palike (BBMP), to detect, rapidly sequence and verify the existence of the omicron variant in samples from two Covid-19 infected individuals.
They hope this will aid in a rapid response to contain the spread of variants of concern. Prof Satyajit Mayor from the NCBS conveyed the information to local and national authorities, and the Indian government released a statement on December 2, all within four days of receiving the samples. Both SARS-CoV-2 genomes have also been uploaded to the global repository for SARS-CoV-2 sequences, GISAID, so that they can be publicly available to the scientific community, the NCBS said. (IANS/ MBI)
(Keywords: Hyderabad, New Delhi, Pune, Bengaluru, The National Centre for Biological Sciences, Situation, NCBS, Omicron)