On a fine scale, the Universe seems lumpier than it should be.
(DOE/SLAC National Accelerator Laboratory) Their work uses machine learning to transform the way scientists tune particle accelerators for experiments and solve longstanding mysteries in astrophysics and cosmology.
Dark energy is one of the greatest mysteries in science today. We know very little about it, other than it is invisible, it fills the whole universe, and it pushes galaxies away from each other. This is making our cosmos expand at an accelerated rate. But what is it? One of the simplest explanations is that it is a “cosmological constant” – a result of the energy of empty space itself – an idea introduced by Albert Einstein. Many physicists aren’t satisfied with this explanation, though. They want a more fundamental description of its nature. Is it some new type… This story continues at The Next Web
An international consortium has compiled the most comprehensive 3D map of the observable cosmos to date.
(Ecole Polytechnique Fédérale de Lausanne) An international consortium of scientists has analyzed, as part of a vast program of cosmological surveys, several million galaxies and quasars, thus retracing a more continuous history of the Universe and offering a better understanding of the mechanisms of its expansion. The latest 6 year-long survey called eBOSS was initiated, and led in part, by EPFL astrophysicist Jean-Paul Kneib.
In late August, paleontologists reported finding the fossil of a flattened turtle shell that “was possibly trodden on” by a dinosaur, whose footprints spanned the rock layer directly above.The rare discovery of correlated fossils potentially traces two bygone species to the same time and place.Original story reprinted with permission from Quanta Magazine, an editorially independent publication of the Simons Foundation whose mission is to enhance public understanding of science by covering research developments and trends in mathematics and the physical and life sciences.Like fossils, astronomical objects are not randomly strewn throughout space.“Paleontologists infer the existence of dinosaurs to give a rational accounting of strange patterns of bones,” said Nima Arkani-Hamed, a physicist and cosmologist at the Institute for Advanced Study in Princeton, New Jersey.“We look at patterns in space today, and we infer a cosmological history in order to explain them.”
A new instrument mounted on a telescope in Arizona aimed its robotic array of 5,000 fiber-optic "eyes" at the night sky on Oct. 22 to capture the first images showing its unique view of galaxy light.It'll allow us to go 11 billion years back in time and measure ancient light with unprecedented precision.The latest milestone marks the beginning of DESI's final testing before the formal start of observations in early 2020.He chairs a group of DESI scientists who are currently running simulations of how dark energy has impacted baryon acoustic oscillation - fluctuations in the density of matter caused by sound waves in the early universe.Pointing 5,000 'eyes' at the skyInstallation of DESI began in February 2018 at the Nicholas U. Mayall Telescope at Kitt Peak National Observatory near Tucson, Arizona.
The universe is expanding faster than scientists predicted, a finding that has created what one astrophysicist calls "the crisis in cosmology."A new study confirmed this dilemma using new telescope technology and data from NASA's Hubble Space Telescope.A team of researchers have confirmed this dilemma with data gathered using a new telescope technology that relies on shape-shifting mirrors.According to their study, which was published last month in the Monthly Notices of the Royal Astronomical Society, precise measurements of the rate at which the universe is expanding don't match the standard model that scientists have been using for decades.The mystery of the Hubble ConstantThe universe is always getting bigger, stretching galaxies farther apart.
Advances in astronomical observation over the past century have allowed scientists to construct a remarkably successful model of how the cosmos works.But when it comes to the question of how fast our universe is expanding, some new cosmological measurements are making us ever more confused.Since the 1920s we’ve known that the universe is expanding – the more distant a galaxy is, the faster it is moving away from us.Now a new study, published in Science, presents a method that may help to solve the mystery.Hubble’s Constant can be estimated by combining measurements of the distances to other galaxies with the speed they are moving away from us.By the turn of the century, scientists agreed that the value was about 70 kilometers per second per megaparsec – one megaparsec is just over 3m light-years.
The Nobel Prize in physics for 2019 was awarded to three scientists on Tuesday for groundbreaking work on the evolution of the universe and Earth's place in it.Their discoveries have forever "transformed our ideas about the cosmos" and helped answer fundamental questions about existence, said the Royal Swedish Academy of Sciences.Half of the award went to James Peebles, a physicist with Princeton University, for developing a theoretical framework that traces the the history of the universe, from the Big Bang to present day.His contributions to the Big Bang model and other work led to insights that just 5% of the universe is known matter -- everything from stars to plants to humans -- and the remaining 95% is unknown dark matter and dark energy."When I started working in this subject -- I can tell you the date, 1964 --at the invitation of my mentor, Professor Robert Henry Dicke, I was very uneasy about going into this subject because the experimental observational basis was so modest.I just kept going," Peebles said during a news conference, according to Princeton University.
STOCKHOLM (AP) — A Canadian-American cosmologist and two Swiss scientists won this year's Nobel Prize in Physics on Tuesday for their work in understanding how the universe has evolved from the Big Bang and the blockbuster discovery of the first known planet outside our solar system.Canadian-born James Peebles, 84, of Princeton University, was credited for "theoretical discoveries in physical cosmology" and Switzerland's Michel Mayor, 77, and Didier Queloz, 53, each from the University of Geneva, were honored for discovering "an exoplanet orbiting a solar-type star," said Prof. Goran Hansson, secretary general of the Royal Swedish Academy of Sciences.The Nobel committee said Peebles' theoretical framework about the cosmos — and its billions of galaxies and galaxy clusters — amounted to "the foundation of our modern understanding of the universe's history, from the Big Bang to the present day."Mayor and Queloz were credited having "started a revolution in astronomy" notably with the discovery of exoplanet 51 Pegasi B, a gaseous ball comparable with Jupiter, in 1995 — a time when, as Mayor recalled — that "no one knew whether exoplanets existed or not."An exoplanet is a planet outside the solar system."Prestigious astronomers had been searching for them for years, in vain!"
Today's Nobel Prize in physics was evenly split between two discoveries and, thus, unevenly split among the three honored.Typically when this happens, the two discoveries are at least somewhat related; that doesn't seem to be the case here, as the Prize Committee has recognized James Peebles for his contributions to theoretical cosmology and Michel Mayor and Didier Queloz for the first clear discovery of an exoplanet orbiting a main sequence star.He was at Princeton University (where he remains) when Arnold Penzias and Robert Wilson at nearby Bell Labs had identified the cosmic microwave background (CMB) that was produced in the aftermath of the Big Bang.But as the evidence built, Peebles contributed a paper that indicated that our Milky Way's halo wouldn't look like it did without copious amounts of dark matter.His work later helped lay the foundation for our current understanding that dark matter is cold, or moving at speeds far less than that of light.In an example cited by the Nobel Committee, gravity would cause an initial contraction.
the Two other winners are on the first discovery of an extrasolar planet in orbit around a sun-like star.the Nobel prize in physics, is to a canadian, James Peebles, and the swiss, Michel Mayor and Didier Queloz.Peebles is awarded half of the prize ”for the contribution to our understanding of the evolution of the universe and earth's place in the universe.”In practice, the writing of the Royal Swedish academy of Sciences, James Peebles, one of the key figures as the cosmology, that is to say, the application of the doctrine of the universe's beginning and development, to be composed of more-or-less educated guesses to be the weekend.as Of today, because the scientists know that the universe was created by a giant explosionsliknande the event, the big bang, nearly 14 billion years ago.At the beginning of the universe was a relatively small, very hot, and was composed of a dense partikelsoppa.
The creator of a curious encryption technology was heckled on stage during a bizarre presentation at the recent Black Hat security conference in Las Vegas, and now the company has filed suit against the conference organisers for allowing them to be roasted.At the event, Crown Sterling founder Robert Grant gave a sponsored talk titled “The 2019 Discovery of Quasi-Prime Numbers: What Does This Mean For Encryption?” which was based on a paper he co-wrote and during which he promoted his company’s “Time AI” technology.A strange Crown Sterling explainer video somehow makes the concept seem even more confusing.“Academic researchers believe this discovery may be the key to unlocking a new unified physics cosmology—a theory of everything,” the video claims.“Now is the time for a new adaptive encryption—granting you security and full control of your digital individuality.A new paradigm of data sovereignty made possible only with time.