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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News Network
July 14,2020

Kathmandu, Jul 14: After staking claim to Indian territories of Lipulekh-Kalapani in  a new controversial map,  Nepal Prime Minister KP Sharma Oli on Monday claimed that Ayodhya, the birthplace of Lord Rama, is in Nepal and Lord Rama was Nepali.

“Although real Ayodhya lies at Thori, city in the west of Birgunj, India has claimed that Lord Rama was born there. Due to these continuous claims, even we have believed that deity Sita got married to Prince Rama of India. However, in reality, Ayodhya is a village lying west of Birgunj,” Oli claimed at an event organised at Prime Minister's residence in Kathmandu.

The Prime Minister also blamed India of cultural encroachment by “creating a fake Ayodhya.”

“Balmiki Ashram is in Nepal and the holy place where King Dashrath had executed the rites to get the son is in Ridi. Dashrath’s son Ram was not an Indian and Ayodhya is also in Nepal,” he claimed.

In an attempt to save self from criticism, Oli questioned how Lord Rama could come to Janakpur to marry Sita when there were "no means" of communication. He further said that it to be impossible for Lord Rama to come to Janakpur from present Ayodhya that lies in India.

“Janakpur lies here and Ayodhya there and there is talk of marriage. There was neither telephone nor mobile then how could he know about Janakpur,” Oli said.

Comments

Ahmed Ali Kulai
 - 
Tuesday, 14 Jul 2020

New controversy

 
BJP got next election Muddah

Farhan
 - 
Tuesday, 14 Jul 2020

Ab Ram Mandir Kaha Banega???

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News Network
February 29,2020

Feb 29: The "Dadi of Shaheenbagh" on Friday said that Prime Minister Narendra Modi does not understand the pain of losing children, as speakers at an anti-CAA rally here called on protesters to maintain peace and not give in to any provocation.

Tushar Gandhi, the great-grandson of Mahatma Gandhi, said that the battle is not for a day or two, but the protesters will have to be prepared to continue it for years to come.

Asma Khatoon, who has earned fame as the "Dadi of Shaheenbagh" in Delhi, asked how can a person take care of the whole country when he cannot maintain his own family.

"He would have realised how it feels to lose a child if he had his own children," she told a gathering at the Park Circus Maidan, which is being termed as the Shaheenbagh of Kolkata with women holding a sit-in for the last 53 days to protest the Citizenship (Amendment) Act, proposed nationwide NRC, and the NPR.

The death toll Delhi's communal violence has gone up to 42.

She said it is not biryani that has attracted women to the protest at Shaheen bagh while holding that such vilification campaigns will have no effect on the agitation.

State BJP president Dilip Ghosh has claimed that "uneducated men and women" are protesting at Delhi's Shaheen Bagh and Kolkata's Park Circus as they get money and biryani purchased with foreign funds.

"Home Minister Amit Shah has called 20 protesters to meet him, but I want to tell him that we are one lakh and I want him to mention the place where he wants us to go for the meeting," she said.

Tushar Gandhi said, "People should stay united and not give in to any provocation," he said.

Gandhi said that the people of West Bengal are lucky to have Mamata Banerjee as their chief minister.

"They will try to break her also and it is necessary that you continue to give her support," he said.

Gandhi claimed that no one can harm a country where its mothers and sisters come out to save it.

He claimed that the CAA is not about Hindus or Muslims, but will really affect the poor people, who will be made to run around to get their papers instead of earning for their basic and daily needs.

"It's a dichotomous government that we have at the Centre. On the one hand, they want us to provide documents to prove our citizenship, while on the other they refuse to accept the papers that one produces before it for the purpose," he said.

He claimed that the government is forcing its people to resort to lies and declare that they are political refugees from countries like Bangladesh and Pakistan.

Gandhi claimed that time and again documents with the government like electoral rolls and land documents have been used to identify people of certain communities during riots.

"So it is dangerous to give too much information to the government," he said.

He called on the people to have faith in non-violence and asked them to maintain peace and harmony.

B R Ambedkar's great-grandson Rajratna Ambedkar claimed that it is the Adivasis who will also be affected by the CAA.

"I want to tell Modi and Shah that the country runs on the Constitution by Ambedkar and not M S Golwalkar (of RSS)," he said, adding that because of the rights conferred on people by the Constitution, those backward people who did not have the right to sit on a bullock cart are now flying jet planes.

He said that Modi and Shah committed an error by enacting the CAA as it has turned the people of the country into Indians only, instead of Hindus, Muslims, Christians or Sikhs.

"Every machinery of the country has been taken control of by the RSS. If one Modi or one Shah goes, they will bring in several more Modi or Shah," he said.

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Agencies
March 8,2020

Consumer watchdog Which? has claimed that more than one billion Android phones and tablets are vulnerable to hackers as they no longer supported by security updates.

According to the research report, the most at-risk phones are any that run Android 4 or older and those smartphones running Android 7.0 which can not be updated are also at risk.

Based on data from Google analysed by Which?, two in five android device users around the world are no longer receiving the important updates. Currently, those devices are unlikely to have issues, but the lack of security leaves them open to attack.

"It is very concerning that expensive Android devices have such a short shelf life before they lose security support, leaving millions of users at risk of serious consequences if they fall victim to hackers," Kate Bevan editor Which? said in a statement.

"Google and phone manufacturers need to be upfront about security updates with clear information about how long they will last and what customers should do when they run out. The government must also push ahead with planned legislation to ensure manufacturers are far more transparent about security updates for smart devices and their impact on consumers," Kate added.

Android phone released around 2012 or earlier, including popular models like the Samsung Galaxy S3 and Sony Xperia S, are particularly at risk to hackers.

Which? has made suggestions to Android users on what to consider if they have an older phone that may be at risk.

Any Android device which is more than two years old, check whether it can be updated to a newer version of the operating system. If it is on an earlier version than Android 7.0 Nougat, try to update via Settings> System>Advanced System update.

In case a user is not able tto update the phone, the device could be at risk of being hacked if it is running a version of Android 4 or lower.

A user also need to be careful about downloading apps outside the Google Play store and should also install a mobile anti-virus via an app.

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