Showing 20 articles starting at article 141
< Previous 20 articles Next 20 articles >
Categories: Physics: Optics, Space: Astronomy
Published Pair plasmas found in deep space can now be generated in the lab
(via sciencedaily.com) Original source Researchers have experimentally generated high-density relativistic electron-positron pair-plasma beams by producing two to three orders of magnitude more pairs than previously reported.
Published Watery planets orbiting dead stars may be good candidates for studying life -- if they can survive long enough
(via sciencedaily.com) Original source The small footprint and dim light of white dwarfs, remnants of stars that have burned through their fuel, may make excellent backdrops for studying planets with enough water to harbor life. The trick is spotting the shadow of a planet against a former star that has withered to a fraction of its size and finding that it's a planet that has kept its water oceans for billions of years even after riding out the star's explosive and violent final throes. A new study of the dynamics of white dwarf systems suggests that, in theory, some watery planets may indeed thread the celestial needles necessary to await discovery and closer scrutiny.
Published Mysterious mini-Neptunes
(via sciencedaily.com) Original source This study discovered mini-Neptunes around four red dwarfs using observations from a global network of ground-based telescopes and the TESS space telescope. These four mini-Neptunes are close to their parent stars, and the three of them are likely to be in eccentric orbits.
Published Nanosized blocks spontaneously assemble in water to create tiny floating checkerboards
(via sciencedaily.com) Original source Researchers have engineered nanosized cubes that spontaneously form a two-dimensional checkerboard pattern when dropped on the surface of water. The work presents a simple approach to create complex nanostructures through a technique called self-assembly.
Published NASA's Roman mission gets cosmic 'sneak peek' from supercomputers
(via sciencedaily.com) Original source Researchers used supercomputers to create nearly 4 million simulated images depicting the cosmos.
Published Researchers leverage inkjet printing to make a portable multispectral 3D camera
(via sciencedaily.com) Original source Researchers have used inkjet printing to create a compact multispectral version of a light field camera. The camera, which fits in the palm of the hand, could be useful for many applications including autonomous driving, classification of recycled materials and remote sensing.
Published Scientists adapt astronomy method to unblur microscopy images
(via sciencedaily.com) Original source Researchers have adapted a class of techniques employed in astronomy to unblur images of far-away galaxies for use in the life sciences, providing biologists with a faster and cheaper way to get clearer and sharper microscopy images.
Published Quantum dots and metasurfaces: Deep connections in the nano world
(via sciencedaily.com) Original source A team has developed printable, highly efficient light-emitting metasurfaces.
Published Wind from black holes may influence development of surrounding galaxies
(via sciencedaily.com) Original source Clouds of gas in a distant galaxy are being pushed faster and faster -- at more than 10,000 miles per second -- out among neighboring stars by blasts of radiation from the supermassive black hole at the galaxy's center. It's a discovery that helps illuminate the way active black holes can continuously shape their galaxies by spurring on or snuffing out the development of new stars.
Published How do supermassive black holes get super massive?
(via sciencedaily.com) Original source By combining forefront X-ray observations with state-of-the-art supercomputer simulations of the buildup of galaxies over cosmic history, researchers have provided the best modeling to date of the growth of the supermassive black holes found in the centers of galaxies.
Published New biomarker database designed to improve astronaut health may also be useful to earthlings
(via sciencedaily.com) Original source As space travel becomes more frequent, a new biomarker tool was developed by an international team of researchers to help improve the growing field of aerospace medicine and the health of astronauts.
Published Scientists spot more Milky Way-like galaxies in early universe
(via sciencedaily.com) Original source Scientists are peering into the past and uncovering new clues about the early universe. Since light takes a long time to travel through space, they are now able to see how galaxies looked billions of years ago. The astronomers have discovered that spiral galaxies were more common in the early universe than previously thought. The scientists found that nearly 30% of galaxies have a spiral structure about 2 billion years after the universe formed. The discovery provides a significant update to the universe's origin story as previously told using data from NASA's Hubble Space Telescope.
Published Would astronauts' kidneys survive a roundtrip to Mars?
(via sciencedaily.com) Original source The structure and function of the kidneys is altered by space flight, with galactic radiation causing permanent damage that would jeopardise any mission to Mars, according to a new study led by researchers from UCL.
Published New technique could help build quantum computers of the future
(via sciencedaily.com) Original source Researchers have demonstrated a new method that could enable the large-scale manufacturing of optical qubits. The advance could bring us closer to a scalable quantum computer.
Published How did a satellite galaxy of the Milky Way come to be?
(via sciencedaily.com) Original source Crater 2, located approximately 380,000 light years from Earth, is one of the largest satellite galaxies of the Milky Way. Extremely cold and with slow-moving stars, Crater 2 has low surface brightness. How this galaxy originated remains unclear. A team of physicists now offers an explanation.
Published Switching nanomagnets using infrared lasers
(via sciencedaily.com) Original source Physicists have calculated how suitable molecules can be stimulated by infrared light pulses to form tiny magnetic fields. If this is also successful in experiments, the principle could be used in quantum computer circuits.
Published New computer vision method helps speed up screening of electronic materials
(via sciencedaily.com) Original source A new computer vision technique developed by engineers significantly speeds up the characterization of newly synthesized electronic materials. Such materials might be used in novel solar cells, transistors, LEDs, and batteries.
Published Lone Star State: Tracking a low-mass star as it speeds across the Milky Way
(via sciencedaily.com) Original source Astronomers have discovered a rare hypervelocity L subdwarf star racing through the Milky Way. More remarkably, this star may be on a trajectory that causes it to leave the Milky Way altogether.
Published NASA's Webb opens new window on supernova science
(via sciencedaily.com) Original source Peering deeply into the cosmos, NASA's James Webb Space Telescope is giving scientists their first detailed glimpse of supernovae from a time when our universe was just a small fraction of its current age. A team using Webb data has identified 10 times more supernovae in the early universe than were previously known. A few of the newfound exploding stars are the most distant examples of their type, including those used to measure the universe's expansion rate.
Published Researchers engineer new approach for controlling thermal emission
(via sciencedaily.com) Original source If a material absorbs light, it will heat up. That heat must go somewhere, and the ability to control where and how much heat is emitted can protect or even hide such devices as satellites. An international team of researchers has published a novel method for controlling this thermal emission in Science.