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☆ Dyson spheres: Could alien megastructures exist in the Milky Way? Scientists found 7 places to look
▼ + stars: | 2024-06-13 | by ( Jacopo Prisco | ) edition.cnn.com time to read: +13 min

Now, a new study that looked at 5 million stars in the Milky Way galaxy suggests that seven candidates could potentially be hosting Dyson spheres — a finding that’s attracting scrutiny and alternate theories. If Dyson spheres really exist, what could they be used for? “Freeman Dyson said that we should dismantle Jupiter — the whole planet (for the raw materials).”That supercolossal scale probably means that Dyson spheres, if they exist at all, are very rare. “However, contamination by circumstellar debris disks, which mimic Dyson Sphere infrared signatures, remains a concern,” he added in an email. However, he added, the radiation fingerprint of the seven Dyson sphere candidates might be explained by natural phenomena as well.

Persons: Freeman Dyson, ”, Dyson, Olaf Stapledon’s, George Dyson, ’, Freeman J, couldn’t, Matías Suazo, Suazo, “, Webb, that’s, Gabriella Contardo, NASA’s James Webb, ” Suazo, “ Freeman Dyson, Jason Wright, James Webb, —, Leslie Surginer, ” George Dyson, Tomotsugu Goto, Zaza Osmanov, ” Osmanov, George Organizations: CNN, Institute of, “, ‘, AP, Dyson, SETI Institute, Fermi, Accelerator Laboratory, Fermilab, Royal Astronomical Society, Uppsala University, NASA, Survey, JPL, ESA, European Space Agency, Micron, Sky Survey, University of Massachusetts, Jet Propulsion Laboratory, International School, Studies, Telescope, Penn State University, James Webb Space Telescope, William Press, Computer Science, University of Texas, Tsing Hua, SETI, of Physics, Free University of Tbilisi Locations: British, Princeton , New Jersey, Sweden, Trieste, Italy, Austin, Tsing Hua University, Taiwan, Georgia

☆ Astronomers spot a ‘super-Earth’ 137 light-years away
▼ + stars: | 2024-02-08 | by ( Ashley Strickland | ) edition.cnn.com time to read: +5 min

CNN —Astronomers have discovered a “super-Earth,” or a world larger than our planet, orbiting a star about 137 light-years away. The super-Earth exoplanet, known as TOI-715b, orbits a red dwarf star that is cooler and smaller than our sun. “This discovery is exciting as it’s the first super-Earth from TESS to be found within the conservative habitable zone,” Dransfield said. If the Earth-size planet is confirmed, it will become the smallest planet yet that TESS has found in a habitable zone. TOI-715b’s star has only shown a couple of flares within the past two years and isn’t considered active, making it an old star, Dransfield said.

Persons: TESS, Georgina Dransfield, Dransfield, James Webb, Webb, “, isn’t, PLATO, ” Dransfield, ” Organizations: CNN —, Royal Astronomical Society, Researchers, University of Birmingham’s School of Physics, Astronomers, James Webb Space Telescope Locations: United Kingdom

☆ 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

☆ The internet just went on a wild quest that could result in floating trains and cheap EVs
▼ + stars: | 2023-08-11 | by ( Hasan Chowdhury | ) www.businessinsider.com time to read: +8 min

The internet went wild over claims scientists discovered a room-temperature superconductor. Here's how a room-temperature superconductor could change everything:Revolutionize the medical industryMRI machines currently depend on liquid helium coolant to keep cool enough to operate. A room-temperature superconductor would go a step further in helping create these fields under normal conditions. With room-temperature superconductors, EV makers might be able to take a closer step towards delivering cheap battery-run cars. This is where room-temperature superconductors could one day step in.

Persons: It's, gloriously, Dr Niladri Banerjee, Banerjee, Michael Fuhrer, Massoud Pedram, Eugene Hoshiko, they'd, Jason Laurea, Lawrence, Robert Knopes, Getty Images Elon, Tesla Organizations: Imperial College London, Theory, School of Physics, Monash University, University of Southern, Airport, Lawrence Livermore National Laboratory, MIT's, Science, Fusion Center, Fusion Systems, Getty Images, TechCrunch Locations: South Korea, Australia, University of Southern California, Shanghai, China, Pudong, levitating, Lawrence Livermore

☆ Webb telescope spies most distant supermassive black hole ever recorded
▼ + stars: | 2023-07-16 | by ( Jackie Wattles | ) edition.cnn.com time to read: +4 min

CNN —The James Webb Space Telescope has delivered yet another astounding discovery, spying an active supermassive black hole deeper into the universe than has ever been recorded. And scientists were perplexed to find just how small the celestial object’s central black hole measures. “This black hole clocks in at about 9 million solar masses,” according to a NASA news release. Into the CEERS 1019 galaxyThe relative smallness of the black hole at CEER 1019’s center is a mystery for scientists. The astronomical community is already pouring over data that could pinpoint other, more distant black holes.

Persons: James Webb, Webb, ” Rebecca Larson, Larson, It’s, We’re, Jeyhan, “ Webb, ”, Seiji Fujimoto Organizations: CNN, NASA, Sun, University of Texas, Rochester Institute of Technology’s School of Physics, Rochester Institute of Technology, NASA Hubble, UT Austin, Austin Locations: Austin, New York

☆ Time appeared to move 5 times slower in the early days of the universe, scientists found
▼ + stars: | 2023-07-05 | by ( Sonam Sheth | ) www.businessinsider.com time to read: +2 min

A new study found that time appeared to move five times slower in the early days of the universe. Scientists used quasars — enormously bright supermassive black holes — to arrive at their findings. The researchers used quasars — supermassive black holes that feed on gas and are among the brightest known celestial objects — to arrive at their finding. Quasars "are crucial to understanding the early universe," one astronomer said in 2018. Albert Einstein, in his general theory of relativity, predicted that we live in an expanding universe, where time was slower in its early years, and now the researchers in this study observed that.

Persons: Albert Einstein's, —, Geraint Lewis, Albert Einstein Organizations: Service, Privacy, CNN, University of Sydney's School of Physics, Sydney Institute for Astronomy

☆ Quasars reveal the early universe moved slower than it does now
▼ + stars: | 2023-07-03 | by ( Ashley Strickland | ) edition.cnn.com time to read: +4 min

CNN —Scientists have peered into the early days of the universe, when it was about 1 billion years old, and discovered that things moved in slow motion compared with now. Unlocking what happened during the early days of the universe can help scientists tackle the biggest mysteries about its origin, how it evolved and what the future holds. “This expansion of space means that our observations of the early universe should appear to be much slower than time flows today. While very bright, supernovas become much harder to observe at greater distances from Earth, which means that astronomers needed another source that would be visible deeper in the early universe. “What we have done is unravel this firework display, showing that quasars, too, can be used as standard markers of time for the early universe.”

Persons: Albert Einstein’s, ”, Geraint Lewis, Einstein, ” Lewis, Brendon Brewer Organizations: CNN —, University of Sydney’s School of Physics, Sydney Institute for Astronomy, University of Auckland

☆ NASA's Hubble Space Telescope watched a distant star die, explode, and fade away in rare, colorful detail
▼ + stars: | 2022-11-11 | by ( Morgan Mcfall-Johnsen | ) www.businessinsider.com time to read: +3 min

NASA's Hubble Space Telescope captured a star that exploded and died 11 billion years ago. The three imprints show different colorful stages of the supernova explosion. Hubble watched the star collapse, expell its outer layers in a violent explosion, and then cool. Three different reflections of the supernova, spotted by NASA's Hubble Space Telescope. The paths had different lengths, so the light arrived at different times, reflecting images from three different stages in the star's death.

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