SCIENCES.ENERGIES.ENVIRONNEMENT/LE MONDE SELON LA PHYSIQUR/W15 P7

Mes lecteurs  neréalisent pas à quel point  ils me    font travailler  à prés de 89 ans ! Alors pour la premere  fois j ai décidé de leur mettre in extenso la copie  de ce que je reçois cghaque jour et dans lequel je dois extraire ce qui méritera ma traduction !  Et inutile de penser  que  du fait que la moitie de ma famille soit americain,me me rend le travai plus court !!!

Physics news

	Applying mathematics to accelerate predictions for capturing fusion energy A key issue for scientists seeking to bring the fusion that powers the sun and stars to Earth is forecasting the performance of the volatile plasma that fuels fusion reactions. Making such predictions calls for considerable costly time on the world's fastest supercomputers. Now researchers at the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL) have borrowed a technique from applied mathematics to accelerate the process.
	New photon-counting camera captures 3-D images with record speed and resolution Researchers have developed the first megapixel photon-counting camera based on new-generation image sensor technology that uses single-photon avalanche diodes (SPADs). The new camera can detect single photons of light at unprecedented speeds, a capability that could advance applications that require fast acquisition of 3-D images such as augmented reality and LiDAR systems for autonomous vehicles.
	Testing how accurately X-ray lasers can measure the inner workings of biological molecules One of the great advantages of X-ray free-electron lasers like the one at the Department of Energy's SLAC National Accelerator Laboratory is that they allow researchers to determine the structure of biological molecules in natural environments. This is important if you want to study how a potential new drug interacts with a virus in conditions similar to those found in the human body. By hitting these samples with ultrashort X-ray laser pulses, scientists can collect data in the instant before damage from the X-rays has time to propagate through the sample.
	Peeking into a world of spin-3/2 materials Researchers have been pushing the frontiers of the quantum world for over a century. And time after time, spin has been a rich source of new physics.
	Could shrinking a key component help make autonomous cars affordable? Engineers and business leaders have been working on autonomous cars for years, but there's one big obstacle to making them cheap enough to become commonplace: They've needed a way to cut the cost of lidar, the technology that enables robotic navigation systems to spot and avoid pedestrians and other hazards along the roadway by bouncing light waves off these potential obstacles.
	Scientists find a rule to predict new superconducting metal hydrides The search for coveted high-temperature superconductors is going to get easier with a new 'law within a law' discovered by Skoltech and MIPT researchers and their colleagues, who figured out a link between an element's position in the Periodic Table and its potential to form a high-temperature superconducting hydride. The new paper is published in the journal Current Opinion in Solid State & Materials Science. The research was supported by the Russian Science Foundation.

ne vous présente que  les titres  physique et astronomie  ,,,,

Astronomy and Space news

	Astronomers investigate young stellar complexes in the galaxy UGC 11973 Astronomers have performed photometric and spectroscopic observations of young stellar complexes in the giant spiral galaxy UGC 11973. Results of this observational campaign provide important insights into the properties of these complexes. The study was detailed in a paper published April 9 on the arXiv pre-print repository.
	Very Large Telescope sees star dance around supermassive black hole, proves Einstein right Observations made with ESO's Very Large Telescope (VLT) have revealed for the first time that a star orbiting the supermassive black hole at the centre of the Milky Way moves just as predicted by Einstein's general theory of relativity. Its orbit is shaped like a rosette and not like an ellipse as predicted by Newton's theory of gravity. This long-sought-after result was made possible by increasingly precise measurements over nearly 30 years, which have enabled scientists to unlock the mysteries of the behemoth lurking at the heart of our galaxy.
	One step closer to touching asteroid Bennu After the successful completion of its "Checkpoint" rehearsal, NASA's first asteroid-sampling spacecraft is one step closer to touching down on asteroid Bennu. Yesterday, NASA's OSIRIS-REx spacecraft performed the first practice run of its sample collection sequence, reaching an approximate altitude of 246 feet (75 meters) over site Nightingale before executing a back-away burn from the asteroid. Nightingale, OSIRIS-REx's primary sample collection site, is located within a crater in Bennu's northern hemisphere.
	Simulating early ocean vents shows life's building blocks form under pressure Where did life first form on Earth? Some scientists think it could have been around hydrothermal vents that may have existed at the bottom of the ocean 4.5 billion years ago. In a new paper in the journal Astrobiology, scientists at NASA's Jet Propulsion Laboratory describe how they mimicked possible ancient undersea environments with a complex experimental setup. They showed that under extreme pressure, fluid from these ancient seafloor cracks mixed with ocean water could have reacted with minerals from the hydrothermal vents to produce organic molecules—the building blocks that compose nearly all life on Earth.
	Researchers discover a six-planet system with near 3:2 resonance Almost visible to the naked eye in the Draco constellation, the star HD 158259 has been observed for the last seven years by astronomers using the SOPHIE spectrograph. This instrument, installed at the Haute-Provence Observatory in the South of France, acquired 300 measurements of the star. The analysis of the data which done by an international team led by researchers from the University of Geneva (UNIGE), has resulted in the discovery that HD 158259 has six planetary companions: a "super-Earth" and five "mini-Neptunes." These planets display an exceptionally regular spacing, which hints at how the system may have formed. This study, published in the journal Astronomy & Astrophysics, also includes TESS space telescope observations of the star, which unveil the density of the innermost planet.
	CHEOPS space telescope ready for scientific operation CHEOPS has reached its next milestone: Following extensive tests in Earth's orbit, some of which the mission team was forced to carry out from home due to the coronavirus crisis, the space telescope has been declared ready for science. CHEOPS stands for "CHaracterising ExOPlanet Satellite," and has the purpose of investigating known exoplanets to determine, among other things, whether they have conditions that are hospitable to life.  PS / JE N AI PLUS D OEIL GAUCHE PAR dmla !!!!!!!!!!!