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
February 9,2020

New Delhi, Feb 9: As the outbreak of novel coronavirus has lead to the death of more than 800 Chinese nationals, aviation regulator DGCA on Saturday said that foreigners who went to China on or after January 15 will not be allowed to enter India.

The DGCA, in its circular to airlines on Saturday, reiterated that all visas issued to Chinese nationals before February 5 have been suspended.

However, the Directorate General of Civil Aviation (DGCA) clarified, "These visa restrictions will not apply to aircrew, who may be Chinese nationals or other foreign nationalities coming from China."

"Foreigners who have been to China on or after January 15, 2020, are not allowed to enter India from any air, land or seaport, including Indo-Nepal, Indo-Bhutan, Indo-Bangladesh or Indo-Myanmar land borders," the DGCA said.

Among Indian airlines, IndiGo and Air India have suspended all of their flights between the two countries. SpiceJet continues to fly on Delhi-Hong Kong route.

On February 1 and 2, Air India conducted two special flights to Chinese city of Wuhan, epicentre of the outbreak, evacuating 647 Indians and seven Maldivians.

Till date, three Indians have tested positive for novel coronavirus.

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News Network
March 6,2020

Riyadh, Mar 6: Saudi Arabia on Thursday emptied Islam's holiest site for sterilisation over fears of the new coronavirus, an unprecedented shutdown state media said will last while the year-round Umrah pilgrimage is suspended.

The kingdom halted the pilgrimage for its own citizens and residents on Wednesday, on top of restrictions announced last week on foreign pilgrims to stop the disease from spreading.

State television relayed images of an empty white-tiled area surrounding the Kaaba -- a large black cube structure inside Mecca's Grand Mosque -- which is usually packed with tens of thousands of pilgrims.

As a "precautionary measure", the area will remain closed as long as the umrah suspension lasts but prayers will be allowed inside the mosque, state-run Saudi Press Agency cited a mosque official as saying.

Additionally, the Grand Mosque and the Prophet's Mosque in the city of Medina will be closed an hour after the evening "Isha" prayer and will reopen an hour before the dawn "Fajr" prayer to allow cleaning and sterilisation, the official added.

A group of cleaners was seen scrubbing and mopping the tiles around the Kaaba, a structure draped in gold-embroidered gold cloth towards which Muslims around the world pray.

A Saudi official told news agency the decision to close the area was "unprecedented".

On Wednesday, Saudi Arabia suspended the umrah for its own citizens and residents over fears of the coronavirus spreading to Islam's holiest cities.

The move came after authorities last week suspended visas for the umrah and barred citizens from the six-nation Gulf Cooperation Council from entering Mecca and Medina.

Saudi Arabia on Thursday declared three new coronavirus cases, bringing the total number of reported infections to five.

The umrah, which refers to the Islamic pilgrimage to Mecca that can be undertaken at any time of year, attracts millions of Muslims from across the globe annually.

The decision to suspend the umrah mirrors a precautionary approach across the Gulf to cancel mass gatherings from concerts to sporting events.

It comes ahead of the holy fasting month of Ramadan starting in late April, which is a favoured period for pilgrimage.

It is unclear how the coronavirus will affect the hajj, due to start in late July.

Some 2.5 million faithful travelled to Saudi Arabia from across the world in 2019 to take part in the hajj, which is one of the five pillars of Islam as Muslim obligations are known.

The event is a massive logistical challenge for Saudi authorities, with colossal crowds cramming into relatively small holy sites, making attendees vulnerable to contagion.

Already reeling from slumping oil prices, the kingdom risks losing billions of dollars annually from religious tourism as it tightens access to the sites.

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News Network
June 9,2020

Jun 9: Prime Minister Narendra Modi wants all 1.3 billion Indians to be “vocal for local” — meaning, to not just use domestically made products but also to promote them. As an overseas citizen living in Hong Kong, I’m doing my bit by very vocally demanding Indian mangoes on every trip to the grocery. But half the summer is gone, and not a single slice so far.

My loss is due to India’s COVID-19 lockdown, which has severely pinched logistics, a perennial challenge in the huge, infrastructure-starved country. But more worrying than the disruption is the fruity political response to it. Rather than being a wake-up call for fixing supply chains, the pandemic seems to be putting India on an isolationist course. Why?

Granted that the liberal view that trade is good and autarky bad isn’t exactly fashionable anywhere right now. What makes India’s lurch troublesome is that the pace and direction of economic nationalism may be set by domestic business interests. The Indian liberals, many of whom are Western-trained academics, authors and — at least until a few years ago — policy makers, want a more competitive economy. They will be powerless to prevent the slide.

Modi’s call for a self-reliant India has been echoed by Home Minister Amit Shah, the cabinet’s unofficial No. 2, in a television interview. If Indians don’t buy foreign-made goods, the economy will see a jump, he said. The strategy — although it’s too nebulous yet to call it that — has a geopolitical element. A military standoff with China is under way, apparently triggered by India’s completion of a road and bridge near the common border in the tense Himalayan region of Ladakh. It’s very expensive to fight even a limited war there. With India’s economy flattened by COVID, New Delhi may be looking for ways to restore the status quo and send Beijing a signal.

Economic boycotts, such as Chinese consumers’ rejection of Japanese goods over territorial disputes in the East China Sea, are well understood as statecraft. In these times, it’s not even necessary to name an enemy. An undercurrent of popular anger against China, the source of both the virus and India’s biggest bilateral trade deficit, is supposed to do the job. But is it ever that easy?

A hastily introduced policy to stock only local goods in police and paramilitary canteens became a farcical exercise after the list of banned items ended up including products by the local units of Colgate-Palmolive Co., Nestle SA, and Unilever NV, which have had significant Indian operations for between 60 and 90 years, as well as Dabur India Ltd., a New Delhi-based maker of Ayurveda brands. The since-withdrawn list demonstrates the practical difficulty of bureaucrats trying to find things in a globalized world that are 100% indigenous.

Free-trade champions fret that the prime minister, whom they saw as being on their side six years ago, is acting against their advice to dismantle statist controls on land, labor and capital to help make the country more competitive. Engage with the world more, not less, they caution. But Modi also has to satisfy the Rashtriya Swayamsevak Sangh, the umbrella Hindu organisation that gets him votes. Its backbone of small traders, builders and businessmen — the RSS admits only men — was losing patience with the anemic economy even before the pandemic. Now, they’re in deep trouble, because India’s broken financial system won’t deliver even state-guaranteed loans to them.

The U.S.-China tensions — over trade, intellectual property, COVID responsibility and Hong Kong’s autonomy — offer a perfect backdrop. A dire domestic economy and trouble at the border provide the foreground. Big business will dial economic nationalism up and down to hit a trifecta of goals: Block competition from the People's Republic; make Western rivals fall in line and do joint ventures; and tap deep overseas capital markets. The first goal is being achieved with newly placed restrictions on investment from any country that shares a land border with India. The second aim is to be realized by corporate lobbying to influence India's whimsical economic policies. As for the third objective, with the regulatory environment becoming tougher for U.S.-listed Chinese companies like Alibaba Group Holding Ltd., an opportunity may open up for Indian firms.

All this may bring India Shenzhen-style enclaves of manufacturing and trade, but it will concentrate economic power in fewer hands, something that worries liberals. They’re moved by the suffering of India’s low-wage workers, who have borne the brunt of the COVID shutdown. But when their vision of a more just society and fairer income distribution prompts them to make common cause with the ideological Left, they’re quickly repelled by the Marxist voodoo that all cash, property, bonds and real estate held by citizens or within the nation “must be treated as national resources available during this crisis.” Who will invest in a country that does that instead of just printing money?

At the same time, when liberals look to the business class, they see a sudden swelling of support for ideas like a universal basic income. They wonder if this isn’t a ploy by industry to outsource part of the cost of labor to the taxpayer. Slogans like Modi’s vocal-for-local stir the pot and thicken the confusion. The value-conscious Indian consumer couldn’t give two hoots for calls to buy Indian, but large firms will know how to exploit economic nationalism. One day soon, I’ll get my mangoes — from them.

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