Astronomers discover ‘Super-Earth’ orbiting Sun’s nearest star

Agencies
November 15, 2018

Paris, Nov 15: A "super-Earth" has been discovered orbiting the closest single star to our Sun, scientists said Wednesday in a breakthrough that could shine a light on Earth's nearest planetary neighbours.

Astronomers studied Barnard's Star, a red dwarf just six light years away -- practically in our back garden, galactically speaking -- and noticed the presence of a "frozen, dimly lit world" at least 3.2 times heavier than Earth.

A handout picture released by the European Southern Observatory (ESO), shows an artist's impression of a 'super-Earth' planet viewed from space.

The planet, known for now as Barnard's Star b, is the second nearest to Earth outside the solar system and orbits its host star once every 233 days.

"It's important because it's really our nextdoor neighbour and we like to meet our neighbours in general," Ignasi Ribas, from the Institute of Space Studies of Cataloniaand Spain's Institute of Space Sciences, told AFP.

Despite being relatively close to its parent star, the planet receives less than two per cent of the energy Earth gets from the Sun, and the team estimates it has a surface temperature of -170 degrees Celsius (-274 Fahrenheit) -- far too cold to support life as we know it.

"It's definitely not in the habitable zone, no liquid water. If it has any water or gas this is probably in solid form so that's why we call it frozen," said Ribas.

In mankind's bid to map the planets in the night sky, most historic research has focused on brighter, newer stars, which produce more light and increase the chances of scientists noticing anything orbiting them.

But since Barnard's Star is a red dwarf, a small and cooling star probably about twice as old as the Sun, it produces relatively little light making it hard to discern any bodies in its orbit.

To find Barnard's Star b, Ribas and the team studied more than 20 years' worth of observations from seven separate instruments.

They then used a phenomenon known as the Doppler effect to track the impact of its gravitational pull on its parent star.

Astronomers can use this technique to measure a planet's velocity and, therefore, mass.

"We have all worked very hard on this breakthrough," said Guillem Anglada Escude, from London's Queen Mary University, who co-authored the study published in the journal Nature.

The team worked with the European Southern Observatory using astronomical instruments so accurate they can detect changes in a star's velocity as small as 3.5 kilometres (2.2 miles) per hour -- a gentle walking pace.

It's thought that Barnard's Star is tearing through space at around 500,000 km/h, making it the fastest-moving known object in the universe.

Ribas said that although stargazers could predict its size and orbit with relative accuracy using the Doppler effect, any attempt at this stage to find out what the new planet looked like would be "guesswork".

"It's sort of in a fuzzy area with respect to its properties. We've seen planets of this mass be rocky, meaning that it could look like Earth with a solid surface with potentially some atmosphere or some frozen layer on top," he said.

"Or it may be what we call a mini-Neptune, like a scaled-down version of the gas giants of our solar system."

It might be cold, inhospitable and all but invisible but the new planet has one thing going for it: it's really close.

The only known exoplanet closer to Earth was discovered in 2016 orbiting one of a cluster of stars in the Alpha Centauri system, just over four light years away.

"There's not so many stars in our immediate neighbourhood. The investment to find them is expensive," said Ribas.

"It's really near and therefore if you have the hope -- like I do -- of eventually seeing these planets to study them in detail we have to start with the immediate ones. It could lead potentially to other discoveries."

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Agencies
July 1,2020

The ILO has warned that if another Covid-19 wave hits in the second half of 2020, there would be global working-hour loss of 11.9 percent - equivalent to the loss of 340 million full-time jobs.

According to the 5th edition of International Labour Organisation (ILO) Monitor: Covid-19 and the world of work, the recovery in the global labour market for the rest of the year will be uncertain and incomplete.

The report said that there was a 14 percent drop in global working hours during the second quarter of 2020, equivalent to the loss of 400 million full-time jobs.

The number of working hours lost across the world in the first half of 2020 was significantly worse than previously estimated. The highly uncertain recovery in the second half of the year will not be enough to go back to pre-pandemic levels even in the best scenario, the agency warned.

The baseline model – which assumes a rebound in economic activity in line with existing forecasts, the lifting of workplace restrictions and a recovery in consumption and investment – projects a decrease in working hours of 4.9 percent (equivalent to 140 million full-time jobs) compared to last quarter of 2019.

It says that in the pessimistic scenario, the situation in the second half of 2020 would remain almost as challenging as in the second quarter.

“Even if one assumes better-tailored policy responses – thanks to the lessons learned throughout the first half of the year – there would still be a global working-hour loss of 11.9 per cent at the end of 2020, or 340 million full-time jobs, relative to the fourth quarter of 2019,” it said.

The pessimistic scenario assumes a second pandemic wave and the return of restrictions that would significantly slow recovery. The optimistic scenario assumes that workers’ activities resume quickly, significantly boosting aggregate demand and job creation. With this exceptionally fast recovery, the global loss of working hours would fall to 1.2 per cent (34 million full-time jobs).

The agency said that under the three possible scenarios for recovery in the next six months, “none” sees the global job situation in better shape than it was before lockdown measures began.

“This is why we talk of an uncertain but incomplete recovery even in the best of scenarios for the second half of this year. So there is not going to be a simple or quick recovery,” ILO Director-General Guy Ryder said.

The new figures reflect the worsening situation in many regions over the past weeks, especially in developing economies. Regionally, working time losses for the second quarter were: Americas (18.3 percent), Europe and Central Asia (13.9 percent), Asia and the Pacific (13.5 percent), Arab States (13.2 percent), and Africa (12.1 percent).

The vast majority of the world’s workers (93 per cent) continue to live in countries with some sort of workplace closures, with the Americas experiencing the greatest restrictions.

During the first quarter of the year, an estimated 5.4 percent of global working hours (equivalent to 155 million full-time jobs) were lost relative to the fourth quarter of 2019. Working- hour losses for the second quarter of 2020 relative to the last quarter of 2019 are estimated to reach 14 per cent worldwide (equivalent to 400 million full-time jobs), with the largest reduction (18.3 per cent) occurring in the Americas.

The ILO Monitor also found that women workers have been disproportionately affected by the pandemic, creating a risk that some of the modest progress on gender equality made in recent decades will be lost, and that work-related gender inequality will be exacerbated.

The severe impact of Covid-19 on women workers relates to their over-representation in some of the economic sectors worst affected by the crisis, such as accommodation, food, sales and manufacturing.

Globally, almost 510 million or 40 percent of all employed women work in the four most affected sectors, compared to 36.6 percent of men, it said.

The report said that women also dominate in the domestic work and health and social care work sectors, where they are at greater risk of losing their income and of infection and transmission and are also less likely to have social protection.

The pre-pandemic unequal distribution of unpaid care work has also worsened during the crisis, exacerbated by the closure of schools and care services.

Even as countries have adopted policy measures with unprecedented speed and scope, the ILO Monitor highlights some key challenges ahead, including finding the right balance and sequencing of health, economic and social and policy interventions to produce optimal sustainable labour market outcomes; implementing and sustaining policy interventions at the necessary scale when resources are likely to be increasingly constrained and protecting and promoting the conditions of vulnerable, disadvantaged and hard-hit groups to make labour markets fairer and more equitable.

“The decisions we adopt now will echo in the years to come and beyond 2030. Although countries are at different stages of the pandemic and a lot has been done, we need to redouble our efforts if we want to come out of this crisis in a better shape than when it started,” Ryder said. 

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News Network
February 18,2020

New Delhi, Feb 18: A Delhi court today sent Sharjeel Imam, who has been named as an "instigator" by the Delhi Police in its chargesheet on violent protests against the amended citizenship act at New Friends Colony near Jamia in Delhi last year, to judicial custody till March 3.

Sharjeel Imam was arrested on sedition charges last month.

The Delhi Police has filed a chargesheet before Chief Metropolitan Magistrate Gurmohina Kaur, naming Sharjeel Imam as an instigator of the violence.

It said it has attached CCTV footage, call detail records and statements of over 100 witnesses as evidence in the chargesheet.

The court had on Monday sent Sharjeel Imam to one-day custody of Delhi Police in the case.

Protestors had torched four public buses and two police vehicles as they clashed with police in New Friends Colony near Jamia Millia Islamia in Delhi during the demonstration against the CAA on December 15, leaving nearly 60 people including students, cops and fire fighters injured.

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News Network
March 11,2020

New Delhi, Mar 11: Jyotiraditya Scindia, the Madhya Pradesh politician whose surprise exit from the Congress has brought the Kamal Nath government to the brink of collapse, joined the Bharatiya Janata Party on Wednesday. Scindia joined the BJP at an event in national capital Delhi in the presence of party chief JP Nadda.

Scindia, who was warmly welcomed by Nadda, described 10 March, the day that he exited from the Congress as one of the two life-changing days of his life. The first, he said, was 30 September 2001 when he lost his father. Scindia underscored that the Congress was not the party that it had been and had been living in denial.

Scindia had ended his 18-year-old association with the Congress on Tuesday after meetings with Home Minister Amit Shah and Prime Minister Narendra Modi.

Scindia’s exit from the Congress was followed by resignation letters by about 22 MLAs who had been sequestered in Karnataka. The resignation letters were, however, sent to the Governor and not the assembly speaker, and threatens to upend the Kamal Nath government which has a wafer-thin majority.

If the resignations are accepted, the effective strength of the MP assembly will come down to 206, leaving the Bharatiya Janata Party (BJP) with a slender majority beyond the halfway mark of 103 with its 107 MLAs. For now, the Congress is trying to persuade the MLAs to not pull down the state government.

In his resignation letter to Congress chief Sonia Gandhi that Scindia put out on Twitter soon after, he alluded to his discomfort in the party over the last year or so. “...as you well know, this is a path that has been drawing itself out over the last year,” he had written in his letter.

It was seen as a reference to the Congress settling for Kamal Nath as the chief minister after the 2018 state elections though it was Scindia who had led from the front to oust the BJP from Madhya Pradesh. Scindia’s supporters had hoped that the Congress would tell Kamal Nath to give up his second charge - as the party chief in the state - but this also didn’t happen.

The first hint that something was amiss came in November last year when Scindia removed a reference to the Congress in his Twitter bio and instead wrote “public servant and cricket enthusiast”. He had then explained the change to an effort to make the Twitter bio shorter.

Jyotyiraditya Scindia’s aunt Yashodhara Raje Scindia appeared to declare soon after that the 49-year-old would join the BJP when she welcomed his resignation, calling it “ghar wapsi” or homecoming. “Jyotiraditya was being neglected in Congress,” Yashodhara Raje Scindia said.

Scindia’s grandmother, Vijaya Raje Scindia, was one of the founders of the Jana Sangh, the precursor to the BJP. His aunt Vasundhara Raje is a former Union minister and ex-chief minister of Rajasthan and another aunt Yashodhara Raje is a former minister in the Madhya Pradesh cabinet.

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