Wednesday November 13, 2019

Don’t miss NASA’s first ever live 4K video stream from Space: Peggy Whitson to take viewers 400 km off Earth on April 26

The broadcast will take place at 1:30 p.m. EDT during a session at the 2017 National Association of Broadcasters (NAB) Show in Las Vegas

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NASA Headquarter in USA, VOA

Washington, April 12, 2017: In the first-ever live 4K video stream from space, NASA astronaut and Expedition 51 commander Peggy Whitson will take viewers more than 400 km off the Earth to the International Space Station on April 26.

The broadcast will take place at 1:30 p.m. EDT during a session at the 2017 National Association of Broadcasters (NAB) Show in Las Vegas.

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“The US space agency is a pioneer in the application of advanced media — including 4K. By streaming real-time video that captures images four times the resolution of current HD technology, NASA is enhancing its ability to observe, uncover and adapt new knowledge of orbital and deep space,” the National Association of Broadcasters said in a statement.

To experience the full effect online, devices capable of viewing 4K UHD content will be required, however, lower resolution streams of the live broadcast will be available on NASA Television, NASA’s Facebook page and the agency’s website, the US space agency said.

The conversation with Whitson will take place as part of a panel called “Reaching for the Stars: Connecting to the Future with NASA and Hollywood.”

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The panel will explore how advanced imaging and cloud technologies are taking scientific research and filmmaking to the next level, and will be moderated by Carolyn Giardina, technology editor for the Hollywood Reporter.

The panel is co-produced by NAB Show, NASA, and Amazon Web Services (AWS), and will explore how advanced imaging and cloud technologies are taking scientific research and filmmaking to the next level.

During this event, Whitson will speak with Sam Blackman, CEO of AWS Elemental. (IANS)

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NASA Telescope Captures Record-Breaking Thermonuclear X-Ray Flash: ’Burst was Outstanding’

The observations reveal many phenomena that have never been seen together in a single burst

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NASA, Telescope, Thermonuclear
The X-ray burst, the brightest seen by NICER so far, came from an object named "J1808". Wikimedia Commons

NASA has detected a massive thermonuclear explosion coming from outer space, caused by a massive thermonuclear flash on the surface of a pulsar — the crushed remains of a star that long ago exploded as a supernova.

The explosion released as much energy in 20 seconds as the Sun does in nearly 10 days.

NASA’s Neutron Star Interior Composition Explorer (NICER) telescope on the International Space Station (ISS) detected a sudden spike of X-rays on August 20, reports the US space agency.

The X-ray burst, the brightest seen by NICER so far, came from an object named “J1808”.

NASA, Telescope, Thermonuclear
The explosion released as much energy in 20 seconds as the Sun does in nearly 10 days. Pixabay

The observations reveal many phenomena that have never been seen together in a single burst.

In addition, the subsiding fireball briefly brightened again for reasons astronomers cannot yet explain.

“This burst was outstanding. We see a two-step change in brightness, which we think is caused by the ejection of separate layers from the pulsar surface, and other features that will help us decode the physics of these powerful events,” said lead researcher Peter Bult, an astrophysicist at NASA’s Goddard Space Flight Center in Maryland.

The detail NICER captured on this record-setting eruption will help astronomers fine-tune their understanding of the physical processes driving the thermonuclear flare-ups of it and other bursting pulsars.

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“J1808” is located about 11,000 light-years away in the constellation Sagittarius.

It spins at a dizzying 401 rotations each second, and is one member of a binary system. Its companion is a brown dwarf, an object larger than a giant planet yet too small to be a star. A steady stream of hydrogen gas flows from the companion toward the neutron star, and it accumulates in a vast storage structure called an accretion disk.

Astronomers employ a concept called the “Eddington limit”, named after English astrophysicist Sir Arthur Eddington, to describe the maximum radiation intensity a star can have before that radiation causes the star to expand.

This point depends strongly on the composition of the material lying above the emission source.

NASA, Telescope, Thermonuclear
NASA’s Neutron Star Interior Composition Explorer (NICER) telescope on the International Space Station (ISS) detected a sudden spike of X-rays on August 20, reports the US space agency. Pixabay

“Our study exploits this longstanding concept in a new way,” said co-author Deepto Chakrabarty, a professor of physics at MIT.

“We are apparently seeing the Eddington limit for two different compositions in the same X-ray burst. This is a very powerful and direct way of following the nuclear burning reactions that underlie the event.”

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A paper describing the findings has been published by The Astrophysical Journal Letters. (IANS)