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☆ Gamma-ray burst in faraway galaxy disturbed Earth's upper atmosphere
  + stars: | 2023-11-14 | by ( Will Dunham | ) www.reuters.com   time to read: +4 min
This gamma-ray burst, researchers said on Tuesday, caused a significant disturbance in Earth's ionosphere, a layer of the planet's upper atmosphere that contains electrically charged gases called plasma. It helps form the boundary between the vacuum of space and the lower atmosphere inhabited by people and Earth's other denizens. The gamma rays from the burst impacted Earth's atmosphere for a span of about 13 minutes on Oct. 9, 2022. Instruments on Earth showed that the gamma rays disturbed the ionosphere for several hours and even set off lightning detectors in India. The effects of this gamma-ray burst were studied with the help of the China Seismo-Electromagnetic Satellite (CSES), also called Zhangheng, a Chinese-Italian mission launched in 2018.
Persons: Mirko Piersanti, Piersanti, Pietro Ubertini, Ubertini, Will Dunham, Rosalba O'Brien Organizations: REUTERS, Acquire, Rights, Ray Astrophysics, University of L'Aquila, Nature Communications, National Institute for Astrophysics, Thomson Locations: Italy, India, China
☆ Massive cosmic explosion creates rare elements in space
  + stars: | 2023-10-25 | by ( Ashley Strickland | ) edition.cnn.com   time to read: +6 min
CNN —The James Webb Space Telescope and other observatories witnessed a massive explosion in space that created rare chemical elements, some of which are necessary for life. Tracking stellar explosionsAstronomers have long believed that neutron star mergers are the celestial factories that create rare elements heavier than iron. What was unusual about this burst is that it lasted for 200 seconds, making it a long gamma-ray burst. One of the pair exploded as a supernova, leaving behind a neutron star, and then the same thing happened to the other star. Finding cosmic elementsAstronomers have been trying to determine how chemical elements are created in the universe for decades.
Persons: James Webb, ”, Andrew Levan, Levan, Webb, Fermi, Neil Gehrels, “, Dmitri Mendeleev, ” Levan, it’s, supernovas, Eric Burns, Om Sharan Salafia, Nancy Grace, “ Webb, Ben Gompertz, ” Gompertz Organizations: CNN, James Webb Space Telescope, Way Galaxy, Telescope, Radboud University, Observatory, Royal Society of Chemistry, Astronomers, Louisiana State University, National Institute for Astrophysics, Institute, Gravitational, School of Physics, University of Birmingham Locations: Netherlands, Italy, United Kingdom
☆ Astronomers solve the puzzle of an unusual pulsing dead star
  + stars: | 2023-08-30 | by ( Ashley Strickland | ) edition.cnn.com   time to read: +4 min
The spinning dead star and the companion star that it closely orbits were first discovered in 2007. Once the pulsar began siphoning off material from the companion star, its characteristic pulsing beam disappeared. Instead, the pulsar entered a constant, alternating cycle of operating in what astronomers call “high” mode and “low” mode. They discovered that an exchange of matter between the pulsar and its companion star triggers the unusual behavior of the pulsar. As the pulsar tugs at its companion star, gas releases from the companion and forms a disk around the pulsar before slowly falling toward it.
Persons: ”, Maria Cristina Baglio, Francesco Coti Zelati, Coti Zelati, Sergio Campana Organizations: CNN, Astrophysics, New York University, Italian National Institute for Astrophysics, Institute of Space Sciences, Astronomers, Southern, Italian National Institute for Astrophysics ’, Observatory Locations: New York University Abu Dhabi, Barcelona, Spain, Chile
☆ Webb telescope finds two of the most distant galaxies ever observed
  + stars: | 2022-11-17 | by ( Ashley Strickland | ) edition.cnn.com   time to read: +6 min
CNN —The James Webb Space Telescope has spied one of the earliest galaxies formed after the big bang, about 350 million years after the universe began. Webb’s capability to look deeper into the universe than other telescopes is revealing previously hidden aspects of the universe, including astonishingly distant galaxies such as these two finds. Two distant galaxies were observed by the James Webb Space Telescope. Just a few hundred million years after the big bang, there were already lots of galaxies. Detection of light invisible to the human eyeThe new findings about the two galaxies might mean there are other bright galaxies waiting to be found in the distant universe.
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