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
July 15,2020

New Delhi, Jul 15: Air India has started the process of identifying employees, based on various factors like efficiency, health and redundancy, who will be sent on compulsory leave without pay (LWP) for up to five years, according to an official order.

The airline's board of directors have authorised its Chairman and Managing Director Rajiv Bansal to send employees on LWP "for six months or for a period of two years extendable upto five years, depending upon the following factors - suitability, efficiency, competence, quality of performance, health of the employee, instance of non-availability of the employee for duty in the past as a result of ill health or otherwise and redundancy", the order said on Tuesday.

The departmental heads in the headquarter as well as regional directors are required to assess each employee "on the above mentioned factors and identify the cases where option of compulsory LWP can be exercised", stated the order dated July 14.

"Names of such employees need to be forwarded to the General Manager (Personnel) in headquarter for obtaining necessary approval of CMD," the order added.

In response to queries regarding this matter, Air India spokesperson said,"We would not like to make any comment on the issue."

Aviation sector has been significantly impacted due to the travel restrictions imposed in India and other countries due to the coronavirus pandemic. All airlines in India have taken cost-cutting measures such as pay cuts, LWP and firings of employees in order to conserve cash flow.

For example, GoAir has put most of its employees on compulsory LWP since April.

India resumed domestic passenger flights from May 25 after a gap of two months due to the coronavirus pandemic.

However, the airlines have been allowed to operate only a maximum of 45 per cent of their pre-COVID domestic flights. Occupancy rate in Indian domestic flights has been around 50-60 per cent since May 25.

Scheduled international passenger flights continue to remain suspended in India since March 23.

The passenger demand for air travel will contract by 49 per cent in 2020 for Indian carriers in comparison to 2019 due to COVID-19 crisis, said global airlines body IATA on Monday.

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News Network
March 10,2020

New Delhi, Mar 10: Minutes after Jyotiraditya Scindia submitted his resignation to the party membership to Congress chief Sonia Gandhi, the Congress expelled him for anti-party activities after reports emerged that he had met PM Modi and Amit Shah.

Disgruntled Congress leader Jyotiraditya Scindia met Prime Minister Narendra Modi on Tuesday amid indications that he might join hands with the BJP to topple the Madhya Pradesh government.

Sources said Scindia first met Union Home Minister Amit Shah, and then the two leaders met Modi at the prime minister's residence.

Legislators loyal to Scindia, who has been upset with the Congress leadership with his marginalisation in the affairs of the Madhya Pradesh Congress, are likely to quit the party to reduce the Kamal Nath-led government to a minority.

It is likely to be followed by the Bharatiya Janata Party staking claim to form the government in the state.

The Congress President has approved the expulsion of Jyotiraditya Scindia from the Indian National Congress with immediate effect for "anti-party activities," said KC Venugopal, General Secretary Congress.

No person is, nor will be greater than the party: Congress youth wing chief

Indian Youth Congress (IYC) chief Srinivas B V on Tuesday slammed Jyotiraditya Scindia, who has announced his resignation from the primary membership of the Congress, and thanked party chief Sonia Gandhi for expelling the former Guna MP "who was promoting anti-party activities and factionalism".

"The history of 1857 and 1967 was once again repeated," Srinivas B V said, referring to the 1857 Revolt against East India Company and the role of the Scindia royals back then as well as Vijayaraje Scindia's switch from the Congress to the Jana Sangh in 1967.

"I would like to thank Congress president Sonia Gandhiji for taking the strong steps to expel the leader who was promoting anti-party activities and factionalism," the IYC chief said.

"No person is, nor will be greater than the party," he added.

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Agencies
May 31,2020

Cape Canaveral, May 31: SpaceX, the private rocket company of billionaire entrepreneur Elon Musk, launched two Americans into orbit from Florida on Saturday in a landmark mission marking the first spaceflight of NASA astronauts from U.S. soil in nine years.

A SpaceX Falcon 9 rocket lifted off from the Kennedy Space Center at 3:22 p.m. EDT (19:22 GMT), launching Doug Hurley and Bob Behnken on a 19-hour ride aboard the company’s newly designed Crew Dragon capsule bound for the International Space Station.

Just before liftoff, Hurley said, “SpaceX, we’re go for launch. Let’s light this candle,” paraphrasing the famous comment uttered on the launch pad in 1961 by Alan Shepard, the first American flown into space.

Minutes after launch, the first-stage booster rocket of the Falcon 9 separated from the upper second-stage rocket and flew itself back to Earth to descend safely onto a landing platform floating in the Atlantic.

High above the Earth, the Crew Dragon jettisoned moments later from the second-stage rocket, sending the capsule on its way to the space station.

The exhilarating spectacle of the rocket soaring flawlessly into the heavens came as a welcome triumph for a nation gripped by racially-charged civil unrest as well as ongoing fear and economic upheaval from the coronavirus pandemic.

The Falcon 9 took off from the same launch pad used by NASA’s final space shuttle flight, piloted by Hurley, in 2011. Since then, NASA astronauts have had to hitch rides into orbit aboard Russia’s Soyuz spacecraft.

“It’s incredible, the power, the technology,” said U.S. President Donald Trump, who was at Kennedy Space Center at Cape Canaveral in Florida for the launch. “That was a beautiful sight to see.”

The mission’s first launch attempt on Wednesday was called off with less than 17 minutes remaining on the countdown clock. Weather again threatened Saturday’s launch, but cleared in time to proceed with the mission.

SPACEFLIGHT MILESTONES

NASA chief Jim Bridenstine has said resuming launches of American astronauts on American-made rockets from U.S. soil is the space agency’s top priority.

“I’m breathing a sigh of relief, but I will also tell you I’m not gonna celebrate until Bob and Doug are home safely.” Bridenstine said.

For Musk, the launch represents another milestone for the reusable rockets his company pioneered to make spaceflight less costly and more frequent. And it marks the first time commercially developed space vehicles - owned and operated by a private entity rather than NASA - have carried Americans into orbit.

The last time NASA launched astronauts into space aboard a brand new vehicle was 40 years ago at the start of the space shuttle program.

Musk, the South African-born high-tech entrepreneur who made his fortune in Silicon Valley, is also chief executive of electric carmaker and battery manufacturer Tesla Inc. He founded Hawthorne, California-based SpaceX, formally known as Space Exploration Technologies, in 2002.

Hurley, 53, and Behnken, 49, NASA employees under contract to fly with SpaceX, are expected to remain at the space station for several weeks, assisting a short-handed crew aboard the orbital laboratory.

Boeing Co, producing its own launch system in competition with SpaceX, is expected to fly its CST-100 Starliner vehicle with astronauts aboard for the first time next year. NASA has awarded nearly $8 billion combined to SpaceX and Boeing for development of their rival rockets.

Trump also hailed the launch as a major advance toward the goal of eventually sending humans to Mars.

He was joined at the viewing by Musk, as well as Vice President Mike Pence, Commerce Secretary Wilbur Ross, Education Secretary Betsy DeVos, Florida congressman Matt Gaetz and Senator Rick Scott.

Earlier on Saturday, the crew bid goodbye to their families. Prior to climbing into a specially designed Tesla automobile for the ride to the launch site, Behnken told his young son, “Be good for mom. Make her life easy.”

During the drive, Behnken and Hurley passed former astronaut Garrett Reisman who held a sign saying, “Take me with you.”

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