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US shutdown delays space missions but NASA not grounded: Report,

The images of a thin group of seasonal electric blue clouds on the cusp of our atmosphere captured by a new NASA balloon mission may lead to improved weather forecasting, the US space agency has said.

Data from these clouds, known as noctilucent clouds or polar mesospheric clouds (PMCs), may help scientists better understand turbulence in the atmosphere, as well as in oceans, lakes and other planetary atmospheres, NASA said in a statement on Thursday.


The NASA long-duration balloon mission observed these clouds over the course of five days at their home in the mesosphere.

Scientists have just begun to analyse the photos captured by the mission, the statement added.


NASA balloon mission captures electric blue clouds. (IANS)

“From what we’ve seen so far, we expect to have a really spectacular dataset from this mission,” said Dave Fritts, principal investigator of the PMC Turbo mission at Global Atmospheric Technologies and Sciences in Boulder, Colorado.

“Our cameras were likely able to capture some really interesting events that we hope will provide new insights into these complex dynamics,” Fritts added.

NASA’s PMC Turbo mission launched a giant balloon on July 8 to study PMCs at a height of 50 miles above the surface.

For five days, the balloon floated through the stratosphere from its launch at Esrange, Sweden, across the Arctic to Western Nunavut, Canada.

During its flight, cameras on board the balloon captured six million high-resolution images filling up 120 terabytes of data storage — most of which included a variety of PMC displays, revealing the processes leading to turbulence, NASA said.

Noctilucent clouds coalesce as ice crystals on tiny meteor remnants in the upper atmosphere.


NASA’s PMC Turbo mission launched a giant balloon on July 8 to study PMCs at a height of 50 miles above the surface. Flickr

These clouds are affected by what is known as atmospheric gravity waves — caused by the convecting and uplifting of air masses, such as when air is pushed up by mountain ranges.

The waves play major roles in transferring energy from the lower atmosphere to the mesosphere.

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“This is the first time we’ve been able to visualise the flow of energy from larger gravity waves to smaller flow instabilities and turbulence in the upper atmosphere,” Fritts said.

“At these altitudes you can literally see the gravity waves breaking — like ocean waves on the beach — and cascading to turbulence,” Fritts added. (IANS)


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Tokyo Olympics 2020 Indian wrestler Ravi Kumar enter semi finals.

Indian wrestler Ravi Kumar (57kg) and Deepak Punia (86kg) enjoyed fruitful outings at the Tokyo Olympic Games as they secured semifinal berths in their respective weight categories at the Makuhari Messe on Wednesday.

On the opening day of the wrestling competition, Ravi Kumar defeated Bulgaria's Georgi Vangelov 14-4 on technical superiority to reach the last-four in the men's 57kg category, while compatriot Deepak Punia overcame China's Zushen Lin 6-3 on points to advance to the semifinals.

Ravi Kumar will take on Nurislam Sanayev of Kazakhstan in the last-four, while Punia will be up against David Morris Taylor of the USA.

Earlier, Ravi Kumar had won his opening-round bout by technical superiority against Colombia's Oscar Tigreros to secure a quarterfinal spot. Competing in the Round-of-16 bout against the Colombian wrestler, the 23-year-old Ravi Kumar, who is making his Olympic debut, showed no nerves as he dominated the bout to win by technical superiority (13-2).

Ravi Kumar landed attack after attack and went 13-2 up, winning the bout by technical superiority with minutes to spare. In wrestling, building up a 10-point lead over the opponent results in a victory by technical superiority.

India's 86kg freestyle wrestler Deepak Punia showed no signs of the niggle that had forced him to pull out of the Poland Open Ranking Series in Warsaw in June, as he defeated Nigeria's Ekerekeme Agiomor on technical superiority to secure a quarterfinal berth.

He got his Olympic campaign to a fine start as he was in control from the start of the bout and hardly ever allowed his Nigerian opponent any room to maneuver his moves, finally winning with a 12-1 on technical superiority.

Punia, who had also suffered an elbow injury just before the Games, was slow at the start but came into his own as the bout progressed, inflicting takedowns at regular intervals to earn points.

The Indian wrestler eased into a 4-1 lead at the break and extended his lead comfortably in the second period.

Punia, the silver medallist from the 2019 world wrestling championships, then set up a clash with China's Lin Zushen in the quarterfinals and defeated him 6-3.

(IANS/HP)