Scientists from the University of Delaware’s Bartol Research Institute in the Department of Physics and Astronomy have discovered very-high-energy gamma rays in the Cigar Galaxy (M82), a bright galaxy filled with exploding stars 12 million light years from Earth. The gamma rays observed by the team have energies more than a trillion times higher than the energy of visible light […]
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An international team of astronomers has detected a colossal black hole that is 12 billion times more massive than the sun—so big that it is challenging accepted cosmological thinking. Scientists discovered the enormous celestial body, which is 12.8 billion light-years from Earth, at the center of a brilliantly glowing quasar, a cloud of gas that gets superheated and gives off […]
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Having a sense of purpose may add years to your life—and the benefit can be realized throughout adulthood. That’s the conclusion of a long-term study that tracked the physical and mental health of more than 6,100 Americans aged 20 to 75. Previous research has shown purposefulness to be one of the strongest predictors of longevity, but this is the first […]
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Patients are getting larger and perhaps even dangerous doses of radiation from the growing number of advanced medical-imaging tests being ordered by doctors, a new study says. Researchers at the University of California, San Francisco, analyzed data from millions of patients who received medical treatment between 1996 and 2010. They found that the number of patients who underwent CT scans […]
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Buried deep in the Antarctic ice, an observatory has spotted ghostly, nearly massless particles coming from inside our galaxy and points beyond the Milky Way. Finding these cosmic neutrinos not only confirms their existence but also sheds light on the origins of cosmic rays, the researchers said. The IceCube Neutrino Observatory is made up of 86 shafts dug 8,000 feet […]
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In 2015, scientists predicted that a massive solar eruption would hit Earth just before New Year’s Eve. It was expected to cause power fluctuations, radio blackouts and even affect GPS reception. There was a small chance it could make the Northern Lights visible in the San Francisco Bay Area. The National Oceanic and Atmospheric Administration predicted that the Aurora Borealis […]
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Nine out of 10 Americans have a chemical called bisphenol A in their urine, said Nicholas D. Kristof. BPA, which can be found in plastic food containers, soup can linings, ATM receipts, and many other consumer products, is a proven “endocrine disruptor”—a substance that mimics or alters human hormones. Studies have already linked BPA to breast cancer, diabetes, and hyperactivity, […]
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What is hail or a hailstone? Hail is a form of precipitation that occurs when updrafts in thunderstorms carry raindrops upward into extremely cold areas of the atmosphere where they freeze into balls of ice. Hail can damage aircraft, homes and cars, and can be deadly to livestock and people. How does hail form? Hailstones grow by colliding with supercooled […]
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Sunspot activity may be entering a lull for the first time in almost 400 years, offering scientists a rare chance to gauge how solar conditions affect Earth’s climate. “This is highly unusual and unexpected” says Frank Hill, a researcher at the National Solar Observatory. Three new NSO studies suggest that the sun’s fluctuating magnetic field may soon become too weak […]
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When we see a magical light show from the sun it is called “stretched loops” that are visible when the sun is rotated showing its profile to the earth. These lights move along a magnetic line that shows us these yellow lights that are charged particles of ultraviolet light. In about 5 billion years the sun will shine its last […]
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