Gigantic Bubbles at Center of Milky Way Reaching Out 50,000 Light Years Discovered to be Source of Mysterious Cosmic Rays

 
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A team of scientists from Russia and China has developed a model which explains the nature of high-energy cosmic rays (CRs) in our Galaxy. These CRs have energies exceeding those produced by supernova explosions by one or two orders of magnitude. The model focuses mainly on the recent discovery of giant structures called Fermi bubbles.

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NASA Monitoring 3-Mile-Wide Asteroid --"Largest Potentially Hazardous NEO Ever Tracked This Close to Earth"

 

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On September 1, an asteroid almost three miles wide named after Florence Nightingale will safely fly by Earth at a distance of 4.4 million miles. The last time it came closer to Earth was 1890 and the next time it will come anywhere near us will be 2500. Florence, is one of the biggest near-Earth objects (NEOs) currently being tracked by NASA and will be the largest to pass us at a relatively close distance since the space agency began monitoring them 20 years ago. It is classified as a “potentially hazardous” by the Minor Planet Center.

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Astrophysicists Predict Earth-Like Alien World in Star System Only 16 Light Years Away

 

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Astrophysicists predict that an Earth-like planet may be lurking in a star system just 16 light years away. The team investigated the star system Gliese 832 for additional exoplanets residing between the two currently known alien worlds in this system. Their computations revealed that an additional Earth-like planet with a dynamically stable configuration may be residing at a distance ranging from 0.25 to 2.0 astronomical unit (AU) from the star.

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NASA's Mars 2020 Mission Ups the Ante --"Techniques and Landing Sites Modeled After Searches for Ancient Biosignatures of Life on Earth"

 

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Will NASA discover signs of ancient life at one of the largest and oldest impact craters in the Solar System? "Mars 2020 represents a crucial first step towards a possible Mars sample return," said Ken Williford, Director of the Jet Propulsion Laboratory's Astrobiogeochemistry Laboratory."Our objective is to collect a diverse set of samples from our landing site with the best potential to preserve records of the evolution of Mars - including the presence of life if it was there. We'll use our onboard instruments to provide the critical field context that future scientists would need to understand the measurements made back on Earth.

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A New Look At the 1977 WOW! Signal 6EQUJ5 --A Message from the 'Cosmic Watering Hole'? (VIEW Today's 'Galaxy' Stream)

 

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"If those civilizations are out there – and we don't know that they are – those that inhabit star systems that lie close to the plane of the Earth's orbit around the sun will be the most motivated to send communications signals toward Earth, because those civilizations will surely have detected our annual transit across the face of the sun, telling them that Earth lies in a habitable zone, where liquid water is stable," says Richard Conn Henry, of Johns Hopkins University. "Through spectroscopic analysis of our atmosphere, they will know that Earth likely bears life. Knowing where to look tremendously reduces the amount of radio telescope time we will need to conduct the search.”

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"A Cosmic Laboratory" --Astronomers Use Bizarre Lensing System to Exquisitely Magnify Details of a Supermassive Black Hole

 

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Astronomers using Caltech's Owens Valley Radio Observatory (OVRO) have found evidence for a bizarre lensing system in space, in which a large assemblage of stars is magnifying a much more distant galaxy containing a jet-spewing supermassive black hole. The discovery provides the best view yet of blobs of hot gas that shoot out from supermassive black holes.

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Future Exoplanet Discoveries May Be Tidally Locked, Facing Their Host Star --"More Common Than We Thought"

 

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Many of the exoplanets to be found by the coming high-powered telescopes will probably be tidally locked -- with one side permanently facing their host star -- according to new research by astronomer Rory Barnes of the University of Washington, an assistant professor of astronomy and astrobiology who arrived at the finding by questioning the long-held assumption that only those stars that are much smaller and dimmer than the sun could host orbiting planets that were in synchronous orbit, or tidally locked, as the moon is with the Earth.

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Unique Imaging Technology Reveals Evolutionary Tale of the T-Rex

 

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Researchers using the Los Alamos National Lab's unique neutron-imaging and high-energy X-ray capabilities have exposed the inner structures of the fossil skull of a 74-million-year-old tyrannosauroid dinosaur nicknamed the Bisti Beast in the highest-resolution scan of tyrannosaur skull ever done. The results add a new piece to the puzzle of how these bone-crushing top predators evolved over millions of years.

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Astronomers Search for Galaxies at the Beginning of the Observable Universe

 

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Searches for the most distant galaxies have now probed earlier than the first billion years in the history of the universe, early enough to start seeing the primary effects of the first stars: the reionization of neutral atoms. Astronomers want to understand how galaxies formed and evolved in this period, the timescale over which this reionization took place, the nature of the objects that provided the ionizing photons, and the scenarios in which galaxies and their interstellar medium (ISM) become enriched with atoms made in stellar furnaces.

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