Gomathi Marimuthu, a middle distance runner from Tiruchirappalli, Tamil Nadu, won India’s first gold medal in the 23rd Asian Athletics Championships at the Khalifa Stadium in Qatar on April 22.
Marimuthu emerged from the back to take the lead position in the final few seconds of the 800-metre event. She finished with her personal best of 2 minutes, 2.70 seconds.
The 30-year-old developed an interest in athletics in school and was encouraged by her father, a farm labourer, who used to cycle 5 km daily to drop her for training.
She started training professionally when she got into college and also received a job at the Income Tax department in Bengaluru.
In 2013, she reached the finals of the 800m event at the Asian Championship in Pune. However, in September 2016, she lost her father to colon cancer. Marimuthu told TNIE,
THANKS : MSN NEWS
DEDICATED BY KAVIGNAR THANIGAI.
thanks to :ariea bendix
dedicated by: KAVIGNAR THANIGAI.
thanks to Mirror
The four most likely cradles of life outside our solar system have been identified by scientists.
They contain so-called ‘K’ stars, whose planets may have just the right atmospheres to be harbouring aliens.
K stars are dimmer than our Sun, but brighter than the faintest stars, known as ‘M’ stars’ or red dwarfs.
“I like to think that K stars are in a ‘sweet spot’ between Sun-like stars and M stars,” said planetary scientist Dr. Giada Arney, of NASA’s Goddard Space Flight Centre.
This dramatically narrows down the number of worlds that maybe habitable, according to astronomers.
The search for extraterrestrials faces major challenges – one of which is there are hundreds of billions of stars in our galaxy alone. Scientists can’t investigate them all.
Dr. Arney and colleagues believe K stars are the most promising candidates to be orbited by planets that have the essential ingredients for organisms – either primitive or advanced.
Firstly, they live a very long time – 17 to 70 billion years, compared to 10 billion years for the Sun. This would enable plenty of time for life to evolve.
They also have less extreme activity in their youth than M stars – which also happen to be the most common in the universe, making up three-quarters of them.
One M star, named TRAPPIST-1, is known to host seven Earth-size rocky planets. But their turbulent development presents problems – despite shining for up to a trillion years.
Stellar flares – explosive releases of magnetic energy – are much more frequent and energetic from young M stars than young Sun-like stars.
M stars are also much brighter when they are young, for up to a billion years after they form, with energy that could boil off oceans on any planets that might someday be in the habitable zone.
The study published in Astrophysical Journal Letters said ‘biosignatures’, or signs of life, on a hypothetical planet orbiting a K star would include oxygen and methane.
The gases like to react with each other in an atmosphere implying something is producing them quickly – quite possibly life.
A computer model simulating the chemistry and temperature of a planetary atmosphere showed these are likely to be richest around a K star.
Dr. Arney said: “When you put the planet around a K star, the oxygen does not destroy the methane as rapidly, so more of it can build up in the atmosphere.
“This is because the K star’s ultraviolet light does not generate highly reactive oxygen gases that destroy methane as readily as a Sun-like star.”
This stronger signal has also been predicted for planets around M stars. But their high activity levels might make them unable to host habitable worlds.
K stars can offer the advantage of a higher probability of simultaneous oxygen-methane detection – without the disadvantages that come along with an M star host.
Additionally, exoplanets around K stars will be easier to see than those around Sun-like stars – simply because K stars are dimmer.
Explained Dr. Arney: “The Sun is 10 billion times brighter than an Earthlike planet around it.
“So that is a lot of light you have to suppress if you want to see an orbiting planet. A K star might be ‘only’ a billion times brighter than an Earth around it.”
Her research also suggests nearby K stars that may be the best targets for future observations.
We don’t have the ability to travel to planets around other stars due to their enormous distances from us.
So we are limited to analysing their light to search for a signal that life might be present.
By separating this into its component colours, or spectrum, scientists can identify the constituents of a planet’s atmosphere, since different chemicals emit distinctive ones.
Dr. Arney added: “I find that certain nearby K stars like 61 Cyg A/B, Epsilon Indi, Groombridge 1618, and HD 156026 may be particularly good targets for future biosignature searches.”
An ancient Chinese discipline, tai chi has been adopted as an effective and beneficial tool for both mind and body.
Consisting of a series of slow, fluid movements and deep breathing, tai chi is a form of exercise that places emphasis on stretching and strength training. It incorporates the idea of yin/yang by having the physical element of one’s body complement their mental self-awareness.
Tai chi is also popular because it’s a low-impact form of exercise. Thus it’s suited for individuals who have trouble with mobility, particular elder adults. In fact, Harvard Medical School has declared that it boosts the same benefits as regular exercise(1).
Types of tai chi
There are five different tai chi styles that can be adjusted to better suit one’s personal fitness level.
- Yang style : This type is better suited for beginners. It focuses on relation and slow movements.
- Wu style : Practiced very slowly, this form focuses on micro-movements.
- Chen style : This is a more advanced and physically demanding form of tai chi. It uses both slow and fast movements that include kicking and crouching.
- Sun style : Similar to chen style but less physically demanding.
- Hao style : A less popular and practiced form of tai chi, hao style places emphasis on internal strength and development.
A lot of individuals have begun to use this martial arts because of its ability to boost overall health. Read on for the benefits that adopting tai chi can bring.
Alleviated fibromyalgia symptoms
Fibromyalgia is a disorder that causes chronic muscle pain and fatigue.
According to a recent study published in the British Medical Journal, tai chi can be used as tool in managing the symptoms of fibromyalgia, particularly fatigue and pain.
Better sleep quality
If you’re battling with insomnia, signing up for tai chi can help ensure restful sleep in both young adults and the elderly (2, 3).
Boosted heart health
Exercise can help to strengthen cardiovascular health and tai chi is no different.
Aside from lowering blood pressure, it also helps to ease inflammation and strengthen blood vessels (4).
Enhanced cognitive ability
Aside from its slow, steady movements, tai chi is regularly adopted by older adults because of its effect on their cognitive capabilities.
According to a systematic review published in the Journal of the American Geriatrics Society, tai chi helped to improve memory and operative skills.
Improved mental health
As it places a strong emphasis on meditation and deep, focused breathing, tai chi has been credited as being a natural stress reliever (5).
The controlled breathing helps to promote a self-awareness and this can increase patience and, according to one study, alleviate symptoms of anxiety and depression.
Lowered risk of falling
Tai chi is also popular amongst the elderly because it lowers the risk of falling.
In improving balance and motor function, one study revealed that practicing for 12 to 26 weeks one to three times weekly reduced the frequency of falls by 43%. Another study also revealed how tai not only reduced the risk of falling in people with Parkinson’s disease but it also improved their balance.
With the above-mentioned benefits, one would likely include tai chi in their fitness resolutions. In fact, the ageless Halle Berry cited learning a new martial art as one of her 2019 fitness resolutions.
thanks: The Hindu jan.20.2019
In January, the full moon is also sometimes known as the wolf moon or great spirit moon
Here comes a total lunar eclipse and supermoon, all wrapped into one.
The moon, Earth and sun will line up this weekend for the only total lunar eclipse this year and next. At the same time, the moon will be ever so closer to Earth and appear slightly bigger and brighter than usual a supermoon.
“This one is particularly good,” said Rice University astrophysicist Patrick Hartigan. “It not only is a supermoon and it’s a total eclipse, but the total eclipse also lasts pretty long. It’s about an hour.”
The whole eclipse starts on January 20 night or early on Monday, depending on location , and will take about three hours.
It begins with the partial phase around 10-34 p.m. EST on January 20. That’s when Earth’s shadow will begin to nip at the moon. Totality when Earth’s shadow completely blankets the moon will last 62 minutes, beginning at 11-41 p.m. EST on Sunday.
If the skies are clear, the entire eclipse will be visible in North and South America, as well as Greenland, Iceland, Ireland, Great Britain, Norway, Sweden, Portugal and the French and Spanish coasts. The rest of Europe, as well as Africa, will have partial viewing before the moon sets. Some places will be livestreaming it, including the Griffith Observatory in Los Angeles.
During totality, the moon will look red because of sunlight scattering off Earth’s atmosphere. That’s why an eclipsed moon is sometimes known as a blood moon. In January, the full moon is also sometimes known as the wolf moon or great spirit moon.
So informally speaking, the upcoming lunar eclipse will be a super blood wolf or great spirit moon.
In the U.S., the eclipse will begin relatively early on January 20 evening, making it easier for children to stay up and enjoy the show. Plus the next day is a federal holiday, with most schools closed. But the weather forecast for much of the U.S. doesn’t look good.
Parents “can keep their kids up maybe a little bit later,” said, Hartigan, who will catch the lunar extravaganza from Houston. “It’s just a wonderful thing for the whole family to see because it’s fairly rare to have all these things kind of come together at the same time.”
“The good thing about this is that you don’t need any special equipment,” he added.
Asia, Australia and New Zealand are out of luck. But they had prime viewing last year, when two total lunar eclipses occurred.
The next total lunar eclipse won’t be until May 2021.
As for full-moon supermoons, this will be the first of three this year. The upcoming supermoon will be about 222,000 miles (357,300 kilometres) away. The Feb. 19 supermoon will be a bit closer and the one on March 20 will be the farthest.
The comet will even pass through the observing field of the Transiting Exoplanet Survey Satellite
Stargazers are in for a treat as the “brightest comet” is set to make one of the 10 closest comet flybys of Earth in 70 years, and one may even be able to see it without a telescope on Sunday, NASA said. Although the comet known as 46P/Wirtanen will approach at a distant 11.4 million kilometres or 30 lunar distances from Earth, it’s still a fairly rare opportunity. Comet Wirtanen has already been visible in larger amateur telescopes, and while the brightness of comets is notoriously difficult to predict, there is the possibility that during its close approach comet Wirtanen could be visible with binoculars or to the naked eye, NASA said in a statement on Friday.
“This will be the closest comet Wirtanen has come to Earth for centuries and the closest it will come to Earth for centuries,” said Paul Chodas, manager of the Center for Near-Earth Object Studies at NASA’s Jet Propulsion Laboratory in California. “This could be one of the brightest comets in years, offering astronomers an important opportunity to study a comet up close with ground-based telescopes, both optical and radar,” he added.
First discovered by astronomer Carl Wirtanen in 1948, 46P/Wirtanen, with a width of 1.1 kilometres, orbits the Sun fairly quickly for a comet — once every 5.4 years — making it a short-period comet. (Long-period comets, on the other hand, have orbital periods greater than 200 years.) At the time of closest approach, the comet will appear to be located in the constellation Taurus close to the Pleiades.
In a bid to take advantage of the close approach, astronomers led by the University of Maryland are planning an observation campaign. The campaign would aid in the detailed scientific study of the properties of this “hyperactive” comet which emits more water than expected, given its relatively small nucleus. The comet will even pass through the observing field of the Transiting Exoplanet Survey Satellite (TESS), NASA said.
thanks to Indo =Asian News Service
Ecosystems like oceans and forests may stop absorbing carbon from the atmosphere but start emitting it due to the human-induced climate change, according to a new study.
Those systems are known as natural carbon sinks that could suck carbon dioxide out of the atmosphere. Among them, the peatlands with a carbon dioxide-rich type of soil called peat are the most efficient natural carbon sink on the planet.
When undisturbed, they store more carbon dioxide than all other vegetation types on Earth combined. But when the peatlands are drained and deforested, they can release nearly six percent of global carbon dioxide emissions each year, according to the researchers, Xinhua news agency report
“Global peatlands cover only about three per cent of the global land area but hold around 30 percent of the earth’s soil organic carbon,” said author Zhuang Qianlai, Professor at Purdue University.
For the study, published in the journal Proceedings of the National Academy of Sciences, the team looked at peatlands in the Peruvian Amazon to try to find out if a large amount of peat carbon can be released under a warmer climate.
According to an earth systems model spanning from 12,000 years ago to 2100 AD, the relatively small basin could lose up to 500 million tonnes of carbon by the end of this century.
That’s about five percent of current global annual fossil fuel carbon emissions or 10 percent of US emissions that are spit back out into the atmosphere, the researchers noted.
The study showed that higher temperatures led to more peat carbon loss, although increased precipitation slightly enhanced the build-up of peat carbon over long timescales. Together, the carbon loss from peatlands to the atmosphere would be increased.
“If the area we looked at could represent the whole Amazonia or tropical peatlands, the loss of peat carbon to the atmosphere under future climate scenarios should be of great concern to our society,” Zhuang said.