"Ring of fire" eclipse treat for southern skygazers

February 25, 2017

Feb, 25: A spectacular “ring of fire” solar eclipse Sunday will regale skygazers in South America and southern Africa, with seafarers in the nearby Atlantic getting a front-row view too, astronomers say.

RingofFireEclipse

The eclipse — during which the Sun will all but disappear as the Moon crosses its path — will be most visible in a 100-kilometre (62-mile) band cutting through Chile, Argentina, Angola, Zambia and the Democratic Republic of Congo.

A so-called annular solar eclipse occurs when the Earth, Moon and Sun line up. But even when perfectly aligned, the Moon is too far from Earth to completely block out the Sun, creating instead the impression of a fiery ring.

At first, it will look as if a “bite” has been taken out of the Sun, said Terry Moseley of the Irish Astronomical Association, stressing that viewers should not observe the eclipse unfold with the naked eye.
“This "bite" gradually gets bigger and bigger as the Moon — which is itself invisible — moves further and further in front of the Sun,” he told.

“As about 90 percent of the Sun is covered, you"ll notice a distinct drop in temperature and brightness, and a change in the quality of the light which is hard to describe.”

As the day darkens, birds and animals may enter a night-time routine, thinking sunset is nigh.

At the height of the eclipse the Moon will be right in the middle of the Sun, leaving “a perfect, beautiful, symmetrical ring” of light around the edge before exiting on the other side, said Moseley.

For people just outside the band of optimal viewing, the phenomenon will appear as a ring thicker on one side than the other, said Moseley — “not symmetrical, but still an amazing sight.”

Anyone further afield will see little or nothing.

It will take about two hours for the Moon to move across the face of the Sun, but the “ring of fire” peak will last a mere minute.

Starting in the southeast Pacific Ocean at sunrise, the eclipse will hit solid land at 1221 GMT in southern Chile, near the town of Coyhaique, then cut through Argentina — near Camarones Bay on the eastern coast — before hitting the South Atlantic.

At sea, the eclipse peak will last 44 seconds and “only be visible to any ships that happen to be in the right place at the right time,” said Moseley.

It will reach Angola south of the town of Benguela around 1515 GMT, then move to Zambia and DR Congo just before the Sun sets and the light show ends.

According to the Astronomical Society of Southern Africa (ASSA), the eclipse can be safely observed using a basic pinhole projector.

Punch a tiny hole in a piece of paper with a sharp pencil, hold it into the Sun, and project the image onto a second sheet.

The gaps between tree leaves make for a similar effect on the ground, says the ASSA website, calling this “the coolest and safest way to watch a solar eclipse”.

To look at the Sun directly, one would need special glasses.

Weather is the only potential spoiler.

NASA"s eclipse website recommends watching the weather forecast a day or two before the eclipse, and picking somewhere with a cloud-free prediction.

“Good weather is the key to successful eclipse viewing — better to see a shorter eclipse from clear sky that a longer eclipse under clouds,” it says.

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Agencies
June 17,2020

In a bid to help tackle rise in domestic violence during the social distancing times in India, Twitter on Wednesday launched a dedicated search prompt to serve information and updates from authoritative sources around domestic violence.

Twitter has partnered with the Ministry of Women and Child Development the National Commission for Women in India to expand its efforts towards women.

The search prompt will be available on iOS, Android and on mobile.twitter.com in India, in both English and Hindi languages, the company said in a statement.

Data shows that since the outbreak of Covid-19, violence against women and girls has intensified in India and across the globe.

"We recognise collaboration with the public, government and NGOs is key to combating the complex issue of domestic violence. Accessing reliable information through this search prompt could be a survivor's first step towards seeking help against abuse and violence," said Mahima Kaul, Director, Public Policy, India and South Asia, Twitter.

Every time someone searches for certain keywords associated with the issue of domestic violence, a prompt will direct them to the relevant information and sources of help available on Twitter.

This is an expansion of Twitter's #ThereIsHelp prompt, which was specifically put in place for the public to find clear, credible information on critical issues.

The feature will be reviewed at regular intervals by the Twitter team to ensure that all related keywords generate the proactive search prompt, said the company.

Violence against women and girls across Asia Pacific is pervasive but at the same time widely under reported.

"In fact, in many countries in our region, the number is even greater, with as many as 2 out of 3 women in some countries reporting experiences of violence," added Melissa Alvarado, UN Women Asia Pacific Regional Manager on Ending Violence against Women.

Rekha Sharma, Chairperson, the NCW, said: "With social distancing norms in place, several women are unable to contact their regular support systems. This initiative by Twitter will provide big support to the survivors, who would otherwise be easily isolated without access to relevant information and help".

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Agencies
June 19,2020

Denser places, assumed by many to be more conducive to the spread of the coronavirus that causes COVID-19, are not linked to higher infection rates, say researchers.

The study, led by Johns Hopkins University, published in the Journal of the American Planning Association, also found that dense areas were associated with lower COVID-19 death rates.

"These findings suggest that urban planners should continue to practice and advocate for compact places rather than sprawling ones, due to the myriad well-established benefits of the former, including health benefits," says study lead author Shima Hamidi from Johns Hopkins Bloomberg School of Public Health in the US.

For their analysis, the researchers examined SARS-CoV-2 infection rates and COVID-19 death rates in 913 metropolitan counties in the US.

When other factors such as race and education were taken into account, the authors found that county density was not significantly associated with county infection rate.

The findings also showed that denser counties, as compared to more sprawling ones, tended to have lower death rates--possibly because they enjoyed a higher level of development including better health care systems.

On the other hand, the research found that higher coronavirus infection and COVID-19 mortality rates in counties are more related to the larger context of metropolitan size in which counties are located.

Large metropolitan areas with a higher number of counties tightly linked together through economic, social, and commuting relationships are the most vulnerable to the pandemic outbreaks.

According to the researchers, recent polls suggest that many US citizens now consider an exodus from big cities likely, possibly due to the belief that more density equals more infection risk.

Some government officials have posited that urban density is linked to the transmissibility of the virus.

"The fact that density is unrelated to confirmed virus infection rates and inversely related to confirmed COVID-19 death rates is important, unexpected, and profound," said Hamidi.

"It counters a narrative that, absent data and analysis, would challenge the foundation of modern cities and could lead to a population shift from urban centres to suburban and exurban areas," Hamidi added.

The analysis found that after controlling for factors such as metropolitan size, education, race, and age, doubling the activity density was associated with an 11.3 per cent lower death rate.

The authors said that this is possibly due to faster and more widespread adoption of social distancing practices and better quality of health care in areas of denser population.

The researchers concluded that a higher county population, a higher proportion of people age 60 and up, a lower proportion of college-educated people, and a higher proportion of African Americans were all associated with a greater infection rate and mortality rate.

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Agencies
March 8,2020

New Delhi, Mar 8: In order to spread awareness, a special COVID-19 mobile phone caller tune was launched by all telecom operators with basic infection prevention messages played when a caller dials-out, Ministry of Health and Family Welfare said on Saturday.

"In order to spread awareness about COVID-19, a special COVID-19 mobile phone caller tune was launched by all telecom operators. Over 117.2 crore subscribers of BSNL, MTNL Reliance Jio, Airtel and Vodafone-Idea are being progressively reached out to through SMSs and Call Backs," Ministry of Health and Family Welfare said in a press statement.

"As many as 52 laboratories are now operational across the country for testing the COVID-19 virus. An additional 57 laboratories have been provided with Viral Transport Media and swabs for sample collection," the statement added.

India has 39 confirmed cases of deadly coronavirus so far. The disease has caused deaths of 3200 people globally. 

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