WhyCosmo

In a groundbreaking discovery, NASA scientists have detected a weak yet vital energy field around Earth , the ambipolar electric field . Hypothesized over 60 years ago, this field was recently measured for the first time and could revolutionize our understanding of Earth's atmosphere, its evolution, and even life itself. Earth's North Pole, as seen by  Endurance . The streaks in the sky are from lens flare. ( NASA ) NASA's Endurance mission, launched in May 2022, successfully detected this invisible force at a high altitude of 768 kilometers. The field measured only 0.55 volts—equivalent to a watch battery—. Still, that tiny charge is powerful enough to launch hydrogen ions into space at supersonic speeds, contributing to the polar wind. Simulation This electric field, which balances the forces of gravity and charged particles in Earth's atmosphere, plays a crucial role in puffing up the ionosphere and allowing particles to escape into space. Understanding this field o...

Astronomers have made an exciting discovery of a peculiar lithium-rich star named J0524-0336 that challenges current theories of stellar evolution. This red giant, which is about 40 times the size of our Sun, has been found to contain 100,000 times more lithium than our Sun at a similar stage of life. The discovery, published in the Astrophysical Journal , could indicate a new evolutionary phase in a star's life cycle. Artist rendering of a red giant. Credit: DarkBlackKnight / Wikimedia Commons. (CC-BY-SA-4.0) Stars typically burn lighter elements like hydrogen, helium, and lithium to produce heavier ones through nuclear fusion. However, J0524-0336 defies the norm, suggesting that unknown mechanisms might be at play that allow this star to retain or produce lithium in large amounts. The research team led by Professor Rana Ezzeddine from the University of Florida proposes two possibilities: either J0524-0336 is undergoing a new evolutionary phase, or it may have absorbed a lithiu...

   In a groundbreaking discovery, scientists have finally pinpointed the  origin of the asteroid  that wiped out the  dinosaurs 66 million years ago . This catastrophic event led to the mass extinction of  70% of Earth's species  and has long puzzled researchers. However, a new study published in  Science  reveals that this deadly asteroid was  not a comet , as previously speculated, but a  rare C-type asteroid  formed beyond  Jupiter's orbit . Credit:- AI Imagination Asteroid's Origin:  The study's lead author, Mario Fischer-Godde, a geochemist from the University of Cologne, used advanced techniques to analyze ruthenium isotopes in sediment samples. These isotopes, which match those in asteroids beyond Jupiter, indicate that the Chicxulub impactor originated from this distant region. Debunking the Comet Theory:  Previous theories suggested a comet might have caused the mass extinction. However, the new findings...

    In a breathtaking discovery, astronomers have captured the dramatic transformation of a  supermassive black hole  as it "wakes up" and begins to glow for the first time. This cosmic giant, located  300 million light-years  away at the center of the  galaxy SDSS1335+0728 , has stunned the scientific community by transitioning from a dormant state to a highly active one, a process never observed in real time. A supermassive black hole in galaxy SDSS1335+0728 has lit up. This could give astronomers a new look at how such celestial beasts awaken. This groundbreaking observation, shared in the journal  Astronomy and Astrophysics  on June 18, 2024, sheds new light on the mysterious workings of active galactic nuclei (AGN)—the intensely bright cores of galaxies powered by supermassive black holes consuming vast amounts of matter. The findings could revolutionize our understanding of how these powerful cosmic engines ignite and evolve. The awaken...

  Decades-old Radar Images Reveal Fresh Lava Flows For years, scientists believed Venus was geologically dead, but new evidence suggests that active volcanoes may be common on this second planet from the sun. This groundbreaking discovery emerged from a careful review of photos taken over 30 years ago. "This definitely is another step in the path to understanding Venus as a living, breathing world," says Paul Byrne, a planetary scientist at Washington University in St. Louis. The slopes of Sif Mons, a large volcano on Venus, show signs of relatively recent lava flows (above arrow, highlighted in red). A NASA spacecraft that orbited Venus took this image in the early 1990s. Key Findings: Venus is nearly Earth-sized, and its core might be as hot as Earth's, which could drive volcanic activity. Between 1990 and 1992, NASA's Magellan spacecraft captured radar images of Venus. Recently, researchers found evidence of volcanic activity in these images. The study uncovered tw...

 Astronomers using JWST (the James Webb Space Telescope) have made a groundbreaking discovery, witnessing an awe-inspiring cosmic dance between a supermassive black hole-powered quasar and merging galaxies. This extraordinary event occurred less than a billion years after the Big Bang, providing a rare glimpse into the early universe's mysteries. The quasar, designated PJ308-21, is an active galactic nucleus (AGN) in a galaxy merging with two massive satellite galaxies. Observations reveal that the supermassive black hole at the heart of PJ308-21 consumes surrounding matter, powering the quasar's incredible brightness. Astonishingly, this black hole has a mass equivalent to two billion suns. This cosmic merger is a dramatic event, delivering vast amounts of gas and dust to the supermassive black hole, fueling its growth, and ensuring the continued brilliance of PJ308-21. These findings show how galaxies and supermassive black holes evolved in the universe's infancy. Roberto...

  In an extraordinary breakthrough, a team of astronomers has unveiled that the temperate exoplanet LHS 1140 b might be a " super-Earth " covered in ice or water , located just 48 light-years from us! 🌌🔭 Temperate exoplanet LHS 1140 b may be a world completely covered in ice (left) similar to Jupiter’s moon Europa or may be an ice world with a liquid substellar ocean and a cloudy atmosphere (center). LHS 1140 b is 1.7 times the size of our planet Earth (right) and is the most promising habitable zone exoplanet yet found in the search for liquid water beyond the Solar System. Credit: Benoit Gougeon, Université de Montréal 🌟 LHS 1140 b: The New Super-Earth 🌟 Originally thought to be a mini-Neptune, LHS 1140 b is now considered a potential super-Earth with a nitrogen-rich atmosphere, thanks to the cutting-edge James Webb Space Telescope (JWST) data. Situated in its star's habitable zone , this planet could have the perfect conditions for liquid water, making it a prim...