NASA probe beams back ultraviolet images of Martian atmosphere

October 18, 2016

Washington, Oct 18: In a first, NASA's MAVEN spacecraft has beamed back ultraviolet images of Mars that unveils dynamic, previously invisible activities in the atmosphere of the red planet such as change in ozone levels over the seasons and formation of clouds.master

The images were taken by the Imaging UltraViolet Spectrograph (IUVS) on the Mars Atmosphere and Volatile Evolution mission (MAVEN) - a space probe designed to study the Martian atmosphere while orbiting Mars.

These were then used to make this movie of rapid cloud formation on Mars on July this year.

The movie uses four MAVEN images to show about seven hours of Mars rotation during this period, and interleaves simulated views that would be seen between the four images.

"MAVEN obtained hundreds of such images in recent months, giving some of the best high-resolution ultraviolet coverage of Mars ever obtained," said Nick Schneider from the University of Colorado, Boulder in the US.

Nightside images show ultraviolet (UV) "nightglow" emission from nitric oxide (NO). Nightglow is a common planetary phenomenon in which the sky faintly glows in the complete absence of external light.

Mars' nightside atmosphere emits light in the ultraviolet due to chemical reactions that start on Mars' dayside.

Ultraviolet light from the Sun breaks down molecules of carbon dioxide and nitrogen, and the resulting atoms are carried around the planet by high-altitude wind patterns that encircle the planet.

On the nightside, these winds bring the atoms down to lower altitudes where nitrogen and oxygen atoms collide to form nitric oxide molecules. The recombination releases extra energy, which comes out as ultraviolet light.

Scientists predicted NO nightglow at Mars, and prior missions detected its presence, but MAVEN has returned the first images of this phenomenon in the Martian atmosphere.

Splotches and streaks appearing in the images occur where NO recombination is enhanced by winds.

Such concentrations are clear evidence of strong irregularities in Mars' high altitude winds and circulation patterns. These winds control how Mars' atmosphere responds to its very strong seasonal cycles.

Dayside images show the atmosphere and surface near Mars' south pole in unprecedented ultraviolet detail. They were obtained as spring comes to the southern hemisphere.

Ozone is destroyed when water vapour is present, so ozone accumulates in the winter polar region where the water vapour has frozen out of the atmosphere.

The images show ozone lasting into spring, indicating that global winds are inhibiting the spread of water vapour from the rest of the planet into winter polar regions.

MAVEN observations also show afternoon cloud formation over the four giant volcanoes on Mars.
Clouds are a key to understanding a planet's energy balance and water vapour inventory, so these observations will be valuable in understanding the daily and seasonal behaviour of the atmosphere, researchers said.

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Agencies
February 23,2020

Washington, Feb 23: U.S. president Donald Trump on Saturday said he was looking forward to being with his "great friends" in India next week as he retweeted a short video in which his face was superimposed on the hit movie-character Bahubali, showing the president as a great saviour bringing peace to his kingdom.

Trump will pay a state visit to India on February 24 and 25, accompanied by a high-level delegation including first lady Melania Trump, his daughter Ivanka, son-in-law Jared Kushner and a galaxy of top American officials.

"Look so forward to being with my great friends India!" Trump said in the tweet.

Along with the tweet, Trump retweeted an 81-second video by a Twitter account identified as "Sol" with the handle Solmemes1.

"To celebrate Trump's visit to India I wanted to make a video to show how in my warped mind it will go... USA and India united!" the handle Solmemes1 tweeted in the original post with the video.

Trump appears as a great saviour, in the short animated clip, riding on a chariot with Melania. A few stills later, Trump is seen riding a horse carrying on his shoulders his son Donald Jr and daughter Ivanka.

Later, he is welcomed by Narendra Modi in a village setting. Hundreds and thousands of people are seen welcoming Trump in the video.

"This week Trump will visit India and in celebration I have created a new meme for the occasion... You few, who are my patrons, get to see it first!" Sol told viewers on subscription content service Patreon on Saturday. A few hours later, Trump retweeted the video.

In the Twitter description, Sol describes herself as "award winning master memetician, professor of memology at University of GFY, my views are my own and not associated with real life."

The Trump-Bahubali video, which ends with "USA and India United", went viral after Trump retweeted it. In a few hours, it was seen by nearly 6 lakh people.

Sol in one of her previous posts, dated January 23, writes she was inspired by a video of Bahubali sent to her by a friend, which is the story of 'good defeating evil.'

This inspired Sol to create her first Bahubali-theme meme. The video, lasting 93 seconds, is titled "Jiyo Re Baahu Trump", in which the first lady is seen wearing a saree. "Jiyo Re Bahubali," is the theme song of the video.

"I just loved this video when I saw it! A friend sent it to me and he told me that it is the story of good defeating evil... it was so fitting I had to make it (meme)..." Sol wrote in her post.

Sol's posts show that she is an admirer of Trump. Sol's January 23 video was released at the peak of Trump's impeachment proceedings.

Trump is seen being greeted by an elephant, which bears the logo of the Republican Party.

Towards the end of the video, Trump is seen riding the elephant, and putting on fire the effigy of "Raavan" marked as "D" in a big circle representing the opposition Democratic Party.

An arrow is given by warrior Narendra Modi to the First Lady, who then passes it on to Trump, before he lights the effigy.

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News Network
June 4,2020

Jun 4: Mahatma Gandhi’s statue outside the Indian Embassy in Washington DC was vandalised with graffiti and spray painting by unknown persons allegedly involved in the ongoing protests in the US against the custodial killing of African-American George Floyd.

This has prompted the mission officials to register a complaint with the local law enforcement agencies.

The incident is reported to have taken place on the intervening night of June 2 and 3 in Washington DC.

The Indian embassy has informed the State Department and registered a complaint with local law enforcement agencies, which are now conducting an investigation into the incident.

On Wednesday, a team of officials from Metropolitan Police in consultation with the Diplomatic Security Service and National Park Police visited the site and are conducting inquiries.

Efforts are on to clean up the site at the earliest.

Vandalism of the statue of the apostle of peace comes during the week of nationwide protests against the custodial killing of African-American George Floyd in Minneapolis on May 25.

Several of these protests have turned violent which many times has resulted in damage of some of the most prestigious and sacred American monuments.

In Washington DC, protestors this week burnt a historic church and damaged some of the prime properties and historic places like the national monument and Lincoln Memorial.

One of the few statues of a foreign leader on a federal land in Washington DC, the statue of Mahatma Gandhi was dedicated by the then Prime Minister Atal Bihari Vajpayee, in the presence of the then US president Bill Clinton on September 16, 2000, during his state visit to the US.

In October 1998, the US Congress had authorised the government of India to establish and maintain a memorial “to honour Mahatma Gandhi on Federal land in the District of Columbia."

According to the Indian Embassy website, the sculpture of Mahatma Gandhi is cast in bronze as a statue to a height of 8 feet 8 inches. It shows Gandhi in stride, as a leader and man of action evoking memories of his 1930 protest march against salt-tax, and the many padyatras (long marches) he undertook throughout the length and breadth of the Indian sub-continent.

The statue, the design of which was created by Gautam Pal, is a gift from the Indian Council for Cultural Relations (ICCR). The pedestal for the statue of Mahatma Gandhi is a block of new Imperial Red also known as Ruby Red a block originally weighing 25 tonnes reduced to a size of 9'x7'x3'4". It now weighs 16 tonnes.

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Agencies
July 7,2020

Washington DC, Jul 7: With US President Donald Trump promoting re-opening the economy, the country has now four epicentres of coronavirus instead of one -- Los Angeles, cities in Texas, cities in Florida and Arizona. This has led to the governors fearing that their hospitals could be overrun with patients.

"We are right back where we were at the peak of the epidemic during the New York outbreak...The difference now is that we really had one epicentre of spread when New York was going through its hardship. Now, we really have four major epicentres of spread -- Los Angeles, cities in Texas, cities in Florida and Arizona. Florida looks to be in the worst shape," Scott Gottlieb, former Food and Drug Administration commissioner was quoted by The Washington Post as saying in an interview.

As per the latest data, Florida, New York and California have crossed the 200,000 mark of coronavirus cases.

After Texas continued to break its own record of registering the highest number of coronavirus cases, Austin Mayor Steve Adler (D) was quoted as saying in an interview, "If we do not change this trajectory, then I am within two weeks of having our hospitals overrun."

He further said that intensive care units in the city will start overflowing within 10 days.

Echoing similar sentiments, Judge Lina Hidalgo, the top elected official in Harris County, said, "As long as we're doing as little as possible and hoping for the best, we are always going to be chasing this thing. We are always going to be behind and the virus will always outrun us...And so what we need right now is to do what works, which is a stay-home order."

She was stripped of authority to issue stay-at-home orders after Governor Greg Abbott decided to move forward with the reopening plan.

"It is clear that the (coronavirus) growth is exponential at this point...We have been breaking record after record after record... the last couple of weeks," Miami Mayor Francis Suarez was quoted as saying in an interview.

"The city of Miami was the last city in the entire state of Florida to open. I was criticized for waiting so long. But there is no doubt that the fact that when we reopened, people started socialising as if... the virus didn't exist."

He further said that if the numbers do not begin to fall "more drastic measures" will be taken in the coming week.

As per the latest update by the Johns Hopkins University, a total of 2,938,625 people in the US have tested coronavirus positive and 130,306 deaths have been reported so far.

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