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.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
June 24,2020

Washington, Jun 24: An Indian restaurant in the Sante Fe City of New Mexico, owned by a Sikh, was broken into and vandalised with hate messages scrawled on its walls, a media report said Tuesday.

The damage caused to India Palace restaurant is estimated to be worth USD 100,000, local Santa Fe Reporter said adding that the vandalisation is being investigated by local police and the FBI.

Sikh American Legal Defense and Education Fund (SALDEF) has condemned the incident.

"This kind of hate and violence is unacceptable and swift action must be taken to ensure the safety and security of all Americans," said Kiran Kaur Gill SALDEF executive director.

According to the local daily, tables were overturned, glassware was smashed into piles on the floor, wine racks were emptied, a statue of a goddess was beheaded and computers were stolen.

The vandals also turned over and destroyed food warmers while the front desk area was devastated, plates smashed and the kitchen rendered completely unusable, it said.

"I walked into the kitchen, I saw everything and I was like, hold on, what? What is going on here?" owner Baljit Singh told Santa Fe Reporter. "White power," "Trump 2020," "go home," and far worse were spray-painted on walls, doors, counters and any other available surface.

"Some phrases contained threats of violence and derogatory racial slurs," the daily said.

"Santa Fe is a peaceful town, and the Sikh community has lived here, beautifully integrated, since the 60s," said SALDEF board member Simran Singh, who lives minutes away from the restaurant.

"Tensions have flared recently with the reinvigoration of the Black Lives Matter movement and the removal of statues associated with Spanish colonisers of this area, who committed a number of atrocities," he said.

"Nevertheless, we are seeing an outpouring of love and support around the city and in my experience, our neighbors love and appreciate us, as we love and appreciate them," he added.

SALDEF said that it has seen an unprecedented rise in hate crimes including the April 29 incident wherein a Sikh American Lakhwant Singh was brutally attacked by a man identified as Eric Breeman in Lakewood, Colorado.

Lakhwant Singh was told to "go back to your country," while being attacked. No formal hate crime charges have been brought against the attacker.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
May 12,2020

May 12: Gunmen stormed a hospital on Tuesday in an ongoing attack in the Afghan capital Kabul, as a suicide blast killed 15 people at a funeral in the country's restive east.

Special forces rescued 80 people including mothers and babies from the Kabul hospital after three gunmen launched a morning assault, killing at least four people, the interior ministry said in a statement.

Heavily armed forces were seen carrying babies wrapped in blankets away from the scene, as the clearance operation continued.

The facility, which has a large maternity ward, is located in the west of the city, home to the capital's minority Shiite Hazara community -- a frequent target of Sunni militants from the Islamic State group.

The flare-up in violence comes as Afghanistan grapples with myriad crises including a rise in militant operations across the country and a surge in coronavirus infections.

A paediatrician who fled the hospital told AFP he heard a loud explosion at the entrance of the building.

"The hospital was full of patients and doctors, there was total panic inside," he said, asking not to be named.

The maternity services at the hospital are supported by humanitarian organisation Doctors Without Borders (MSF).

"Hospitals and health workers must not be attacked. We call on all sides to stop attacking hospitals and health workers," said deputy health minister in the city, Waheed Majroh.

Around an hour later, a suicide bomber killed at least 15 people at the funeral of a local police commander in the country's eastern Nangarhar province, according to provincial spokesman Ataullah Khogyani.

The attacker detonated his explosives in the middle of the ceremony.

Zaher Adel, spokesman for the government hospital in Jalalabad, earlier said 12 bodies had arrived from the blast site and more than 50 people were being treated for injuries.

Amir Mohammad, who was wounded in the blast, said thousands of people had gathered for the funeral, an event which often draws huge crowds in Afghanistan.

The violence comes just a day after four roadside bombs exploded in a northern district of Kabul, wounding four civilians including a child.

The bombings were later claimed by the Islamic State group, according to the SITE intelligence group.

They were just the latest in a string of IS attacks on the capital.

In March, at least 25 people were killed by a gunman at a Sikh temple in Kabul, which was later claimed by the group.

IS is also responsible for an infamous attack in March 2017 on one of the country's largest hospitals, when gunmen disguised as doctors stormed the Kabul building and killed dozens.

In recent months, the jihadist group has suffered mounting setbacks after being hunted by US and Afghan forces as well as Taliban offensives targeting their fighters, but it still retains the ability to launch major assaults on urban centres.

The Taliban have largely refrained from launching large attacks on Afghan cities since February when they signed a landmark withdrawal deal with the US meant to pave the way for peace talks with the Kabul government.

Under the agreement, the Taliban promised not to target forces from the US-led coalition, but made no such pledge toward Afghan troops and have stepped up attacks in the provinces.

The Taliban have denied involvement in both of Tuesday's attacks.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
Agencies
February 12,2020

London, Feb 12: Fugitive liquor baron Vijay Mallya returned to the courtroom here on Wednesday, the second day of hearing at the UK High Court, where the former billionaire has appealed against the extradition decision of Westminster Magistrates Court in December 2018.

On being asked about his expectations from the lengthy appeals process against the extradition order as today is the last day for Mallya to present his defence, the embattled former Kingfisher Airlines boss replied, "I have no clue. You see. I'll also see it. Let's not get into a speculative game."

When asked on what would happen if Mallya loses the case and has to return to India, the liquor baron responded: "We do have arguments."

The UK High Court, on Tuesday, had also heard Mallya's appeal against the Westminster Magistrates' Court order extraditing him to India to face alleged fraud and money laundering charges amounting to Rs 9,000 crore.

Mallya was present in the court along with his counsel Clare Montgomery during the hearing. Officials from Enforcement Directorate (ED) and Central Bureau of Investigation (CBI) along with counsel Mark Summers representing the Indian government were also present.

When the judge asked if there was a timeline in the case, Clare said," This is a very dense case," involving multiple individuals and organisations and that not everything had been taken into account by the magistrate Emma Arbuthnot in her ruling against Mallya.

Montgomery contended that the magistrate's ruling had been riddled with "multiple errors". She also brought into question the admissibility of documents submitted by the Indian government - including witness statements and emails that proved crucial in the ruling by judge Arbuthnot, who found "clear evidence of misapplication of loan funds" and that there was a prima facie case of fraud against Mallya.

As she had done throughout the trial, Montgomery continued to assert that Mallya had not acted in a fraudulent manner or run a pyramid and that the collapse of Kingfisher Airlines was, in fact, the failure of a business in difficult economic circumstances.

She also reiterated concerns about the conduct of the Central Bureau of Investigation (CBI) in bringing charges against Mallya, claiming that the tycoon had been made a scapegoat.

Montgomery also stated that the Indian government had presented the loan taken out by Kingfisher Airlines, not as a simple business loan but was part of a larger and elaborate attempt at defrauding the banks by Mallya and Kingfisher Airlines management.

This, Montgomery contended, was but one example of a wider misinterpretation of the case by judge Arbuthnot.

The High Court justices reprimanded Montgomery for concentrating on the evidence - in essence rehashing the case presented at the lower court - rather than the apparent "mistakes" made by judge Arbuthnot in her ruling.

Mallya remains on bail of £650,000 as he has done throughout this legal process.

The Crown Prosecution Service which is representing the Government of India will present its case for the extradition of Mallya on Wednesday.

The 63-year-old businessman fled India in March 2016 and has been living in the UK since then.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.