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NASA discovers galactic tail twice as long as Milky Way

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Washington: An unbelievable and extraordinary ribbon of hot gas has been discovered by NASA’s Chandra X-ray Observatory.

This ribbon, or X-ray tail, is likely due to gas stripped from the galaxy as it moves through a vast cloud of hot intergalactic gas.

With a length of at least 250,000 light years, it is likely the largest such tail ever detected.

The tail is located in the galaxy cluster Zwicky 8338, which is almost 700 million light years from Earth.

The length of the tail is more than twice the diameter of the entire Milky Way galaxy.

The tail contains gas at temperatures of about 10 million degrees Celsius but still hot enough to glow brightly in X-rays that Chandra can detect, the US space agency said in a statement.

The researchers think the tail was created as a galaxy known as CGCG254-021, or perhaps a group of galaxies dominated by this large galaxy, plowed through the hot gas in Zwicky 8338.

The pressure exerted by this rapid motion caused gas to be stripped away from the galaxy.

Astronomers were also able to learn more about the interactions of the system by carefully examining the properties of the galaxy and its tail.

The tail has a brighter spot, referred to as its “head”. Behind this head is the tail of diffuse X-ray emission.

The gas in the head may be cooler and richer in elements heavier than helium than the rest of the tail.

In front of the head there are hints of a bow shock, similar to a shock wave formed by a supersonic plane and in front of the bow shock is the galaxy CGCG254-021.
The paper describing these results was published in the Astronomy and Astrophysics journal. (IANS) (image: nasa.gov)

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NASA Partnering with 10 Start-ups to Develop New Technologies For Space

"Industry is developing new technologies rapidly, using new tools and methods in software development and other areas,"

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NASA researchers have created the atmosphere of a super-hot planet outside our solar system, here on Earth. Pixabay

NASA is inviting applications from start-ups to take part in a three-month pilot programme to develop new technologies for space.

Applications will be accepted till April 7 and a total of 10 companies will be selected for the programme, the US space agency said.

The accelerator programme will focus on technologies that can be applied to space — including geospatial analytics, digital design coupled to advanced manufacturing, autonomous systems, applied Artificial Intelligence (AI) and Machine Learning (ML).

NASA
NASA Administrator James Bridenstine delivers remarks as he tours the NASA Michoud Assembly Facility in New Orleans. VOA

“We want to assist these companies in developing their own technologies and becoming commercial successes. NASA will also benefit by collaborating with these companies,” said Tom Cwik, Manager of the Space Technology Office at Jet Propulsion Laboratory (JPL) in Pasadena, California.

Based in Los Angeles, the accelerator programme begins on July 15. After developing their concepts and business plans over a three-month period, the teams will then pitch their results to the NASA community, co-sponsors and private investors at a demo day in October, NASA said.

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“Industry is developing new technologies rapidly, using new tools and methods in software development and other areas,” said Cwik.

“It’s incumbent upon us to learn from developments in industry and contribute our vast expertise in technology as we prepare to use them in our future missions,” Cwik added. (IANS)