Astronomers discover 83 supermassive black holes 13 billion light-years away

Agencies
March 15, 2019

Washington, Mar 15: Astronomers have discovered 83 quasars powered by supermassive black holes 13 billion light-years away from the Earth, from a time when the universe was less than 10 per cent of its present age.

“It is remarkable that such massive dense objects were able to form so soon after the Big Bang,” said Michael Strauss, a professor at Princeton University in the US.

“Understanding how black holes can form in the early universe, and just how common they are, is a challenge for our cosmological models,” Strauss said in a statement.

This finding, published in The Astrophysical Journal, increases the number of black holes known at that epoch  considerably, and reveals, for the first time, how common they are early in the universe’s history.

In addition, it provides new insight into the effect of black holes on the physical state of gas in the early universe in its first billion years.

Supermassive black holes, found at the centers of galaxies, can be millions or even billions of times more massive than the Sun.

While they are prevalent today, it is unclear when they first formed, and how many existed in the distant early universe.

A supermassive black hole becomes visible when gas accretes onto it, causing it to shine as a “quasar.” Previous studies have been sensitive only to the very rare, most luminous quasars, and thus the most massive black holes.

The new discoveries probe the population of fainter quasars, powered by black holes with masses comparable to most black holes seen in the present-day universe.

The team used data taken with “Hyper Suprime-Cam” (HSC) instrument, mounted on the Subaru Telescope of the National Astronomical Observatory of Japan, which is located on the summit of Maunakea in Hawaii.

The researchers selected distant quasar candidates from the sensitive HSC survey data.

They then carried out an intensive observational campaign to obtain spectra of those candidates, using three telescopes: the Subaru Telescope; the Gran Telescopio Canarias on the island of La Palma in the Canaries, Spain; and the Gemini South Telescope in Chile.

The survey revealed 83 previously unknown very distant quasars.

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ABDUL AZIZ SHE…
 - 
Saturday, 16 Mar 2019

SUBHAANALLAH

 

 
ALLAH ALMIGHTY CREATED EVERTHING  INCLUDING WHOLE UNIVERSE AND WHAT IS IN IT,

HUMAN BEING CANNOT REACH TO UNDERSTAND IT,  HUMAN LIFE NOT SUFFEICENT TO REACH AND KNOW EVERYTHING.

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Agencies
March 13,2020

Amid the rapid spread of the novel coronavirus (COVID-19), which has infected 73 people in India and killed more than 4,500 individuals globally, doctors have advised that in addition to regularly washing hands, one should also disinfect their smartphone every 90 minutes with alcohol-based hand sanitizer.

Ravi Shekhar Jha, Head of Department at Fortis Escorts Hospital in Faridabad said the best method to disinfect your smartphone is to use regular doctor spirit or the alcohol-based hand sanitizer at least every 90 minutes.

"Avoid touching your eyes, mouth, or nose. The best option is to use a phone cover or a Bluetooth device and try to touch your phone as less as possible. We would also recommend cleaning your phone at least twice a day," Jha told IANS.

According to research, published in 2018 by Insurance2Go, a gadget insurance provider, revealed that smartphone screens have three times more germs than a toilet seat.

One in 20 smartphone users was found to clean their phones less than every six months, said the study.

"In the time of fear of coronavirus, smartphones should also be disinfected with alcohol-based sanitizer rub. Pour few drops of sanitizer on a tiny clean cotton pad and rub it safely on your entire phone," said Jyoti Mutta, Senior Consultant, Microbiology, Sri Balaji Action Medical Institute in New Delhi.

"You can repeat this process every evening coming back home after an entire day out at work and once in the morning before going out," Mutta added.

"Maintain basic cleanliness, and try to avoid using other's phones especially if suffering from respiratory illness or flu-like symptoms as there is no other way to disinfect these regular gadgets," she stressed.

Another study from the University of Surrey in the UK, also found that the home button on your smartphone may be harbouring millions of bacteria - some even harmful.

The World Health Organisation (WHO) declared the novel coronavirus as a global pandemic on Wednesday. The death toll of COVID-19 has crossed the 4,500 marks and confirmed cases globally have touched one lakh as per the reports.

According to Suranjeet Chatterjee, Senior Consultant in Internal Medicine Department of Indraprastha Apollo Hospitals in New Delhi, "We should frequently wash our hands, cover our coughs and it is important to adapt to other good hygiene habits that are most important in such a situation."

"Coronavirus and other germs can live on surfaces like glass, metal or plastics and phones are bacteria-ridden. It is necessary that we sanitize our hands frequently and make sure that our hands are clean all the time," Chatterjee told IANS.

"The emphasis should be laid on sanitising our hands rather than sanitizing the phone - once in a while the phone can be sanitized under the guidance of the makers of the phone," Chatterjee stressed.

According to the global health agency, the most effective way to protect yourself against coronavirus is by frequently cleaning of your hands with alcohol-based hand rub or washing them with soap and water.

The WHO's report showed the virus infects people of all ages, among which older people and those with underlying medical conditions are at a higher risk of getting infected.

People should eat only well-cooked food, avoid spitting in public, and avoid close contact, the WHO said, adding that it is important for people to seek medical care at the earliest if they become sick.

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News Network
January 7,2020

Mumbai, Jan 7: Against the backdrop of the attack on JNU students, the Shiv Sena on Tuesday hit out at Prime Minister Narendra Modi and Union Home Minister Amit Shah, alleging that what they wanted was happening, and said such "brutal politics" was never seen before in the country.

An editorial in Shiv Sena mouthpiece 'Saamana' further alleged that the BJP wanted to see "Hindu-Muslim riots" over the Citizenship Amendment Act, but that did not happen.

Since the BJP has been cornered over the issue of CAA, several things are happening out of "revenge", it said.

Comparing the attack on Jawaharlal Nehru University (JNU) students to the 26/11 Mumbai terror strikes, the Shiv Sena said: "divisive politics" was dangerous for the country.

It said the Union Home Ministry's decision to file cases against "unknown" attackers at JNU was laughable. "Those who entered JNU with masks are not unknown," it claimed.

On Sunday, a mob of masked young people stormed the Jawaharlal Nehru University (JNU) campus in south Delhi and targeted students in three hostels, unleashing mayhem with sticks, stones and iron rods, hitting inmates and breaking windows, furniture and personal belongings.

Nearly 34 people were injured in the violence.

"The fallout of JNU attack is being seen elsewhere in the country...what Modi and Shah want is happening. The country is in danger. Divisive politics is dangerous for the country," the Uddhav Thackeray-led party said.

Terrorists who attacked Mumbai on November 26, 2008, were also masked and the same was seen at JNU. Such elements need to be exposed, it said.

"Allowing blood stains in universities, colleges and beating up of students and indulging in politics over the burning situation...such brutal politics was never seen before," the Marathi publication said while terming the attack on JNU students as a "blot" on the law and order situation.

Lashing out at Amit Shah, the Sena said he his in Delhi and busy distributing official pamphlets door-to-door to promote the Citizenship Amendment Act.

There is "confusion and unrest" in the country over the new citizenship law, it pointed out.

"The BJP wanted to see Hindu-Muslim riots over the issue, but that did not happen. The nationwide protests are not being done by Muslims alone. Hindus will also be affected due to the new Act," the Shiv Sena said.

It said the BJP has been cornered over the CAA issue.

Since the prevailing situation is "BJP versus the rest", hence "out of revenge", several things are happening, the Marathi daily said, adding that "there is room for doubt if the JNU attack was part of the revenge."

The BJP has condemned the violence and said universities should stay away from politics, it noted.

"Who brought violence and politics in universities in the last five years? Who is implementing the policy of destroying those who don't agree with your ideology by use of power?" it asked.

Without taking any name, the Sena said those who call students opposing the CAA as anti-nationals, are themselves anti-national.

"When Amit Shah accuses Congress leaders Rahul Gandhi and Priyanka Gandhi of inciting violence, he admits that the Gandhi siblings have that much power to create mass awareness against a law brought in by the Centre and bring people to streets," the Sena said.

One cannot say if the Gandhi siblings incited violence, but one thing is sure that the Union Home Minister and his party are forced to distribute pamphlets to "clarify" on the new citizenship law, it said in sarcastic comments.

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Agencies
June 10,2020

US dictionary Merriam-Webster will update the meaning of the word "racism" after being contacted by a Missouri black woman, who claimed the current definition fell short of including the systematic oppression of people of colour, according to media reports.

"A revision to the entry for racism is now being drafted to be added to the dictionary soon, and we are also planning to revise the entries of other words that are related to racism or have racial connotations," according to a statement of the 189-year-old dictionary shared by Kennedy Mitchum, a recent graduate of Drake University in Iowa, on her Facebook.

Mitchum, 22, emailed the dictionary last month, following the death of African American George Floyd in the custody of four Minneapolis police officers, Xinhua news agency reported.

"I kept having to tell them that definition is not representative of what is actually happening in the world," Mitchum told CNN. "The way that racism occurs in real life is not just prejudice, it's the systemic racism that is happening for a lot of black Americans."

Merriam-Webster's first definition of racism is "a belief that race is the primary determinant of human traits and capacities and that racial differences produce an inherent superiority of a particular race."

"It's not just disliking someone because of their race," Mitchum wrote in a Facebook post on Friday. "This current fight we are in is evidence of that, lives are at stake because of the systems of oppression that go hand-in-hand with racism."

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