Showing 20 articles starting at article 841
Categories: Geoscience: Volcanoes, Space: Structures and Features
Published Researchers trace dust grain's journey through newborn solar system
(via sciencedaily.com) Combining atomic-scale sample analysis and models simulating likely conditions in the nascent solar system, the study revealed clues about the origin of crystals that formed more than 4.5 billion years ago. The findings provide insights into the fundamental processes underlying the formation of planetary systems, many of which are still shrouded in mystery.
Published Hubble data confirms galaxies lacking dark matter
(via sciencedaily.com) The most accurate distance measurement yet of ultra-diffuse galaxy (UDG) NGC1052-DF2 (DF2) confirms beyond any shadow of a doubt that it is lacking in dark matter. The newly measured distance of 22.1 +/-1.2 megaparsecs are based on 40 orbits of NASA's Hubble Space Telescope, with imaging by the Advanced Camera for Surveys and a 'tip of the red giant branch' (TRGB) analysis.
Published How a supermassive black hole originates
(via sciencedaily.com) How do supermassive black holes in the early universe originate? A team led by a theoretical physicist has come up with an explanation: a massive seed black hole that the collapse of a dark matter halo could produce.
Published Dark matter is slowing the spin of the Milky Way's galactic bar
(via sciencedaily.com) Original source For 30 years, astrophysicists have predicted such a slowdown, but this is the first time it has been measured. The researchers say it gives a new type of insight into the nature of dark matter, which acts like a counterweight slowing the spin.
Published Axions could be the fossil of the universe researchers have been waiting for
(via sciencedaily.com) Original source No one knows what happened in the universe for its first 400,000 years, but a new paper suggests discovering the hypothetical particle axion could shed light on the early history of the universe. What's more, current dark matter experiments may have already detected it in its data.
Published Turbulence in interstellar gas clouds reveals multi-fractal structures
(via sciencedaily.com) Astronomers describe the complex structure of the interstellar medium using a new mathematical method. The dispersion of interstellar turbulence in gas clouds before star formation unfolds in a cosmically small space.
Published Gravitational wave search no hum drum hunt
(via sciencedaily.com) The hunt for the never before heard 'hum' of gravitational waves caused by mysterious neutron stars has just got a lot easier, thanks to an international team of researchers.
Published Alien radioactive element prompts creation rethink
(via sciencedaily.com) The first-ever discovery of an extraterrestrial radioactive isotope on Earth has scientists rethinking the origins of the elements on our planet.
Published Hubble captures giant star on the edge of destruction
(via sciencedaily.com) In celebration of the 31st anniversary of the launching of NASA's Hubble Space Telescope, astronomers aimed the renowned observatory at a brilliant 'celebrity star,' one of the brightest stars seen in our galaxy, surrounded by a glowing halo of gas and dust.
Published Bubble with titanium trigger titanic explosions
(via sciencedaily.com) Scientists have found fragments of titanium blasting out of a famous supernova. This discovery, made with NASA's Chandra X-ray Observatory, could be a major step in pinpointing exactly how some giant stars explode.
Published Surprise twist suggests stars grow competitively
(via sciencedaily.com) Original source A survey of star formation activity in the Orion Nebula Cluster found similar mass distributions for newborn stars and dense gas cores, which may evolve into stars. Counterintuitively, this means that the amount of gas a core accretes as it develops, and not the initial mass of the core, is the key factor in deciding the final mass of the produced star.
Published Baked meteorites yield clues to planetary atmospheres
(via sciencedaily.com) Original source In a novel laboratory investigation of the initial atmospheres of Earth-like rocky planets, researchers heated pristine meteorite samples in a high-temperature furnace and analyzed the gases released. Their results suggest that the initial atmospheres of terrestrial planets may differ significantly from many of the common assumptions used in theoretical models of planetary atmospheres.