Did Our Universe Collide With Another When it was 380,000 Years Old? Credit: SLIM FILMS The multiverse is a hypothesis that has slowly been gaining credence in the world of cosmology. To simplify the idea, the multiverse is basically the idea that there are other universes and we all exist in the same void ‘space’ region. Similar to how we see multiple planets, multiple solar systems, and multiple galaxies, some scientists believe multiple universes also exist. Only problem is proving the existence of something that has a unique set of natural laws existing outside of our own universe inside a region of voidness with little to no physical laws is… difficult. There are a few ways of collecting evidence for the existence of other universes, and even fewer with current technology. For a while now, scientists have had a problem with this brilliant image. Credit: ESA/Planck Collaboration If you look at the image, you’ll see a line drawn across it. How a “bruise” may look. There are so many models for inflation running around, it could make your head spin.
ALMA sonde le mystère des jets issus des trous noirs géants | ESO France eso1344fr — Communiqué de presse scientifique 16 octobre 2013 Deux équipes internationales d'astronomes ont utilisé toute la puissance du Vaste Réseau d’Antennes (Sub-)Millimétrique de l'Atacama (ALMA) pour observer les jets en provenance d'énormes trous noirs situés au centre de galaxies et étudier leur impact sur leurs environnements respectifs. L'une de ces équipes a obtenu la meilleure image à ce jour du gaz moléculaire qui entoure un trou noir relativement calme et peu distant ; l'autre équipe a capturé un cliché inattendu de la base d'un puissant jet situé à proximité d'un trou noir distant. La plupart des galaxies de l'Univers, y compris la nôtre, la Voie Lactée, abritent en leur cœur des trous noirs supermassifs – dont la masse peut atteindre plusieurs milliards de masses solaires. Laboratoire d'Etudes du Rayonnement et de la Matière en Astrophysique - LERMA (Observatoire de Paris / CNRS /Université Pierre et Marie Curie / Université de Cergy-Pontoise). Notes Plus d'informations
De l'eau des comètes à celle des océans Cet article est le 3e de notre série consacrée au télescope Herschel, après "Herschel, une nouvelle fenêtre sur l'Univers" et "le mystère de la naissance des étoiles géantes". CHEMINEMENT. D'où vient l'eau des océans ? L’eau (H2O) est un composant chimique très banal et abondant dans l’Univers. On le retrouve en particulier dans les nuages moléculaires, où naissent les étoiles. Si l’eau à la surface de notre planète vient aussi de l’espace, comment est-elle arrivée jusqu’ici ? Une étoile naît au sein d’un cocon de gaz et de poussière. De l'eau en abondance dans les comètes La comètes sont originaires de deux vastes réservoirs de débris : la ceinture de Kuiper, située après Neptune, et le nuage d’Oort, bien au delà mais dont la forme réelle est inconnue. ABONDANCE. Ainsi le monoxyde de carbone, le dioxyde de carbone (ou gaz carbonique), le méthanol et l’ammoniaque qui représentent les gaz cométaires les plus abondants, ne représentent pas plus de 1 à 30 % du total. HARTLEY 2. DIVERSITÉ.
Institute for Astronomy Press Release:Found: A Strange Lonely Planet without a Star An international team of astronomers has discovered an exotic young planet that is not orbiting a star. This free-floating planet, dubbed PSO J318.5-22, is just 80 light-years away from Earth and has a mass only six times that of Jupiter. The planet formed a mere 12 million years ago—a newborn in planet lifetimes. It was identified from its faint and unique heat signature by the Pan-STARRS 1 (PS1) wide-field survey telescope on Haleakala, Maui. "We have never before seen an object free-floating in space that that looks like this. During the past decade, extrasolar planets have been discovered at an incredible pace, with about a thousand found by indirect methods such as wobbling or dimming of their host stars induced by the planet. “Planets found by direct imaging are incredibly hard to study, since they are right next to their much brighter host stars. PSO J318.5-22 was discovered during a search for the failed stars known as brown dwarfs.
Space Has an Up and Down After All Astronomers love to remind us that there’s no up or down in space. Look out into the depths of the universe and you’ll see galaxies floating edge-on, face-on and at every angle in between. Look at planets circling stars within the Milky Way, and their orbits might be oriented in any direction at all. But for one class of celestial objects this seems to be untrue: planetary nebulae, the gorgeous clouds of gas puffed by stars in their last, gasping moments of life, seem to be mysteriously aligned with the plane of the Milky Way—something that Bryan Rees, an astronomer at the University of Manchester in England, and lead author of a paper in an upcoming issue of Monthly Notices of the Royal Astronomical Society calls “quite unexpected.” That’s putting it mildly. (MORE: Happy Birthday Hubble. The question is, why? Neither of these explains why the hourglasses all point in the same direction, though. (MORE: The Great, Exploding Monte Python Star) (PHOTOS: Explosions in the Sky. Ph. 1 of 10
Astronomers Detect Subtle Twist in the Relic Radiation from the Big Bang This illustration shows how photons in the Cosmic Microwave Background (CMB) are deflected by the gravitational lensing effect of massive cosmic structures as they travel across the Universe. Copyright: ESA and the Planck Collaboration Using data from the National Science Foundation’s South Pole Telescope and ESA’s Herschel Space Observatory, astronomers have made the first detection of a subtle twist in the Cosmic Microwave Background, paving the way towards revealing the first moments of the Universe’s existence. Cosmologists have achieved a first detection of a long-sought component in the Cosmic Microwave Background (CMB). The Cosmic Microwave Background is the most ancient light that has traveled almost unimpeded across the Universe, and it contains a wealth of information about the origin and nature of the cosmos. A small portion of the CMB is polarized, and gravitational lensing also affects this part of the signal. Publications: D. PDF Copy of the Studies:
Enlightening stuff. Neat Stuff Ecstasy Drug-Crazed Ravers Are Like Chemical Buddhas Published on April 4th, 2014 | by Jason Louv Ecstasy drug-fueled Dutch ravers are by turns idiotic and profound in this hilarious video This video (via the Dutch magazine Flabber) captures partygoers out of their skulls on Ecstasy at Thunderdome, a hardcore techno / gabber festival that [&hellip... Read More → Environment & Health When Monsanto Had Its Own Disneyland Exhibit Published on April 2nd, 2014 | by Jason Louv Remembering the Monsanto-sponsored exhibit that touted Better Living Through Chemistry to a generation of American children, 1955-1966 Pliant, malleable, innocent, so trusting: This is the American mass mind, the clay that corporations and advertisers manipulate every [&hellip... ‘Raised by Wolves’: Disturbing, Moving Look at Homeless Youth 5 Countries That are Throwing Monsanto Out on its Ass Published on April 1st, 2014 | by Jason Louv Read ‘The Key’, Grant Morrison’s New Web Comic for the BBC Magick & Spirituality
Découverte d'une énorme planète formée de diamant Des astronomes viennent de découvrir une planète de deux fois la taille de la Terre formée en grande partie de diamant. La découverte peut surprendre mais elle est bien réelle ! Une équipe d’astronomes américains et français a découvert une planète très chaude en grande partie constituée... de diamant. "La surface de cette planète est probablement recouverte de graphite et de diamant plutôt que d'eau et de granite", explique ainsi Nikku Madhusudhan de l'Université Yale, un des co-auteurs de cette découverte. "Ceci est notre premier aperçu d'une exoplanète rocheuse [c'est-à-dire située en dehors du système solaire] avec une composition chimique radicalement différente de celle de la Terre", indique-t-il dans un communiqué. Elle orbite autour de l’étoile 55 Cancri, visible à l'œil nu. Du diamant équivalent à trois fois la masse terrestre C'est en 2004 que la planète a été initialement observée. Vous nous aimez déjà ?
Earth's Gold Came from Colliding Dead Stars We value gold for many reasons: its beauty, its usefulness as jewelry, and its rarity. Gold is rare on Earth in part because it's also rare in the universe. Unlike elements like carbon or iron, it cannot be created within a star. Instead, it must be born in a more cataclysmic event - like one that occurred last month known as a short gamma-ray burst (GRB). Observations of this GRB provide evidence that it resulted from the collision of two neutron stars - the dead cores of stars that previously exploded as supernovae. "We estimate that the amount of gold produced and ejected during the merger of the two neutron stars may be as large as 10 moon masses - quite a lot of bling!" Berger presented the finding today in a press conference at the CfA in Cambridge, Mass. A gamma-ray burst is a flash of high-energy light (gamma rays) from an extremely energetic explosion. Gamma-ray bursts come in two varieties - long and short - depending on how long the flash of gamma rays lasts.
Birth of black hole witnessed, marking watershed moment for astronomy The virtual impossibility of observational astronomy has never been clearer. With astronomers having recorded so many events, now that they’ve used so many different instruments to wring all possible insight from what little information somehow makes it all the way to Earth, simply pointing telescopes at stars is providing diminishing returns. To keep moving forward we need to make use of the universe’s most unusual and, in many cases, violent events so we can see some truly novel data. It’s not just a matter of patience, since the the space industry can’t possibly set up enough telescopes to look everywhere at once. And yet, this week a momentous event occurred somewhere in the universe, now dubbed GRB 130427A, and an “armada of instruments” from all over the world saw it produce a gamma ray burst more powerful than what many researchers believed theoretically possible. The intensity of high-energy gamma rays in that afterglow faded in tandem with its conventional light emissions.
FastSound Project Releases Its First 3D Map of the Far-Distant Universe Figure 1: The FastSound project’s 3D map of the large-scale structure of a region in the Universe about 4.7 billion years after the Big Bang. This area covers 2.5 times 3 degrees of the sky, with a radial distance spanning 12-14.5 billion light years in comoving distance or 8-9.6 billion light years in light travel distance (Note 3). The colors of the galaxies indicate their star formation rate, i.e., the total mass of stars produced in a galaxy every year. The gradation in background color represents the number density of galaxies; the underlying mass distribution (which is dominated by invisible so-called “dark matter” that accounts for about 30% of the total energy in the Universe) would look like this if we could see it. The FastSound Project has released its first version of a 3D map of the far-distant Universe. This video shows 3D distribution of the galaxies (Credit: NAOJ, part of the data provided by CFHT、SDSS) Notes: Source: Subaru Telescope Image: NAOJ, SDSS, CFHT