Showing 20 articles starting at article 661
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Categories: Physics: Acoustics and Ultrasound, Space: Structures and Features
Published Wireless earphones as inexpensive hearing aids
(via sciencedaily.com) Some commercial earbuds can perform as well as hearing aids. The result could help a large proportion of people with hearing loss access more affordable sound amplification devices.
Published Astronomers capitalize on early access to James Webb Space Telescope data
(via sciencedaily.com) First in line to receive data transmissions from the James Webb Space Telescope, a team of astronomers is using the unprecedentedly clear observations to reveal the secret inner workings of galaxies.
Published Safety in space: Synthetic hibernation could provide protection from cosmic radiation
(via sciencedaily.com) It is still a glimpse into the future: Astronauts could be put into artificial hibernation and in this state be better protected from cosmic radiation. At present, there are already promising approaches to follow up such considerations. An international research team now has found decisive indications of the possible benefits of artificial hibernation for radiation resistance.
Published Study of 'polluted' white dwarfs finds that stars and planets grow together
(via sciencedaily.com) A team of astronomers have found that planet formation in our young Solar System started much earlier than previously thought, with the building blocks of planets growing at the same time as their parent star.
Published 2400 new eyes on the sky to see cosmic rainbows
(via sciencedaily.com) The Subaru Telescope successfully demonstrated engineering first light with a new instrument that will use about 2400 fiberoptic cables to capture the light from heavenly objects. Full operation is scheduled to start around 2024. The ability to observe thousands of objects simultaneously will provide unprecedented amounts of data to fuel Big Data Astronomy in the coming decade.
Published Searching for traces of dark matter with neutron spin clocks
(via sciencedaily.com) An international research team has succeeded in significantly narrowing the scope for the existence of dark matter. The experiment makes an important contribution to the search for these particles.
Published Black holes don't always power gamma-ray bursts, new research shows
(via sciencedaily.com) Space scientists may need to rethink how gamma-ray bursts are formed after new research shows new-born supramassive stars, not black holes, are sometimes responsible for these huge extragalactic bursts of energy.
Published Hubble captures three faces of evolving supernova in early universe
(via sciencedaily.com) Three different moments in a far-off supernova explosion were captured in a single snapshot by NASA's Hubble Space Telescope. The star exploded more than 11 billion years ago, when the universe was less than a fifth of its current age of 13.8 billion years.
Published A supernova in distant space allows us to understand the origin of the elements in the universe
(via sciencedaily.com) A supernova is a stellar explosion, which occurs when the lives of some really massive stars come to an end. In this violent epilogue, the star expels the material from its outer layers by means of a shock wave, allowing us to see the various elements it was composed of.
Published NASA's MAVEN observes Martian light show caused by major solar storm
(via sciencedaily.com) For the first time in its eight years orbiting Mars, NASA's MAVEN mission witnessed two different types of ultraviolet aurorae simultaneously, the result of solar storms that began on Aug. 27.
Published Death of a star reveals midsize black hole lurking in a dwarf galaxy
(via sciencedaily.com) An intermediate-mass black hole lurking undetected in a dwarf galaxy revealed itself to astronomers when it gobbled up an unlucky star that strayed too close. The shredding of the star, known as a 'tidal disruption event' or TDE, produced a flare of radiation that briefly outshone the combined stellar light of the host dwarf galaxy and could help scientists better understand the relationships between black holes and galaxies.
Published Red-supergiant supernova: Secrets of an earlier Universe
(via sciencedaily.com) Original source An international research team has measured the size of a star dating back more than 11 billion years ago using images that show the evolution of the star exploding and cooling. The research could help scientists learn more about the early Universe.
Published Ultrathin solar cells promise improved satellite performance
(via sciencedaily.com) As low Earth orbit becomes more cluttered, it becomes increasingly necessary to use middle Earth orbits, and radiation-tolerant cell designs will be needed. Making photovoltaics thinner should increase their longevity because the charge carriers have less far to go during their shortened lifetimes. Scientists propose a radiation-tolerant photovoltaic cell design that features an ultrathin layer of light-absorbing material. Compared to thicker cells, nearly 3.5 times less cover glass is needed for the ultra-thin cells to deliver the same amount of power after 20 years of operation.
Published Early planetary migration can explain missing planets
(via sciencedaily.com) Computer simulations by Rice University scientists and their collaborators are the first to integrate a model of planet formation and evolution that explains two puzzling observations of exoplanets orbiting distant stars: the rarity of worlds about 1.8 times larger than Earth and the near-identical size of adjacent planets in hundreds of planetary systems.
Published Want to fire up the dance floor? Play low-frequency bass
(via sciencedaily.com) To find out how different aspects of music influence the body, researchers turned a live electronic music concert into a lab study. By introducing levels of bass over speakers that were too low to hear and monitoring the crowd's movements, scientists found that people danced 11.8 percent more when the very low frequency bass was present.
Published Automatic speaker recognition technology outperforms human listeners in the courtroom
(via sciencedaily.com) The forensic-voice-comparison system, based on state-of-the-art automatic-speaker-recognition technology, outperformed all the listeners.
Published Oldest planetary debris in our galaxy found from new study
(via sciencedaily.com) Original source Astronomers have identified the oldest star in our galaxy that is accreting debris from orbiting planetesimals, making it one of the oldest rocky and icy planetary systems discovered in the Milky Way.
Published Astronomers discover closest black hole to Earth
(via sciencedaily.com) Astronomers have discovered the closest-known black hole to Earth. This is the first unambiguous detection of a dormant stellar-mass black hole in the Milky Way. Its close proximity to Earth, a mere 1600 light-years away, offers an intriguing target of study to advance our understanding of the evolution of binary systems.
Published Magnetized dead star likely has solid surface
(via sciencedaily.com) A signature in the X-ray light emitted by a highly magnetized dead star known as a magnetar suggests the star has a solid surface with no atmosphere.
Published Polarized X-rays reveal shape, orientation of extremely hot matter around black hole
(via sciencedaily.com) The first observations of a mass-accreting black hole from the Imaging X-Ray Polarimetry Explorer (IXPE) mission reveal new details about the configuration of extremely hot matter in the region immediately surrounding it. Researchers are using measurements of the polarization of X-rays to test and refine models that describe how black holes swallow matter, becoming some of the most luminous sources of light -- including X-rays -- in the universe.