The research is published in the journal Nature. “It really is cocooning the galaxy and protecting it.” “It’s a perfect telltale signature that this corona is really there,” said Krishnarao. They saw more gas around the center of the Large Magellanic Cloud, which tapers off toward its edges. They are so bright that they make the shield visible as a haze, and by looking at 28 quasars the researchers could identify the corona. The researchers had to dig through archival Hubble data to look at quasars, which are extremely bright. These shield structures had been theorized by astronomers before but had never been observed because they are very hard to see. “Galaxies envelop themselves in gaseous cocoons, which act as defensive shields against other galaxies,” explained one of the researchers, Andrew Fox of the Space Telescope Science Institute, in a statement. Stretching 100,000 light-years from the dwarf galaxies, the corona has prevented the more massive Milky Way from pulling away all of its gas. This keeps gas within the galaxies, which is vital as it is what allows them to continue to form new stars. The protective shield, known as a corona, is made up of hot supercharged gas and surrounds the Magellanic clouds. Explora el line up, horarios y todos los detalles para divertirte al mximo. Toda la informacin sobre la edicin ms grande de la historia de este festival al alcance de tu mano. ILLUSTRATION: NASA, ESA, Leah Hustak (STScI) Download Corona Capital CDMX and enjoy it on your iPhone, iPad, and iPod touch. Shown in purple, the corona stretches more than 100,000 light-years from the main mass of stars, gas, and dust that make up the Magellanic Clouds, intermingling with the hotter and more extensive corona that surrounds the Milky Way. Researchers have used spectroscopic observations of ultraviolet light from quasars to detect and map the Magellanic Corona, a diffuse halo of hot, supercharged gas surrounding the Small and Large Magellanic Clouds. Now, research using the Hubble Space Telescope explains how this happened, revealing a protective shield that has kept these smaller galaxies safe. The forces these galaxies experience are enormous, with the gravitational force the Milky Way exerts yanking at them, but despite this, they have somehow stayed intact over billions of years. The Large and Small Magellanic Clouds are small satellite galaxies, bound to our galaxy by gravity and orbiting around it. Our Milky Way galaxy isn’t alone in our corner of the universe - as well as the millions of distant galaxies out there, we have two nearby neighbors. He said public health agencies would be better off being able to track location with careful safeguards.Ĭalo said Google and Apple have been more upfront about the limitations of their model, but he said he’s still worried some governments will treat it as a substitute for crucial investments in free, widespread testing and hiring an army of human contact tracers. But others, including Ryan Calo, a law professor who co-directs the University of Washington’s Tech Policy Lab, said he is concerned about its effectiveness if people get too many false alerts asking them to quarantine themselves. Some privacy advocates have favored the Google-Apple approach because it offers more privacy and security. Tim Brookins, the CEO of ProudCrowd, a startup that developed North Dakota’s app, said Wednesday that North Dakotans will now be asked to download two complementary apps - his model, to help public health workers track where COVID-19 patients have been, and the Apple-Google model, to privately notify people who might have been exposed to the virus.
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