The spiral structure of our Galaxy determined from H II regions. SAO/NASA ADS Astronomy Abstract Service · Full Refereed Journal Article (PDF/Postscript)· Full Refereed Scanned Article (GIF)· References in the article· Citations to the Article (607) (Citation History) · Refereed Citations to the Article· SIMBAD Objects (131)· NED Objects (1)· Also-Read Articles (Reads History) · · Translate This Page Abstract An attempt is made to establish a coherent scheme of the spiral structure of the Galaxy on the basis of a study of H II regions and their exciting stars.
Sans titre. Artist’s conception of approaching the center of the Milky Way Our solar system is inside a large galaxy known as the Milky Way.
All of the stars you can see at night and several hundred billion more are all bound together gravitationally into a huge cluster called a galaxy. Most of the stars in our galaxy are far enough away that they blend together in a thin band across the sky. If you are fortunate enough to view a dark sky outside of the glare of the city lights, you will see this milky band running through the constellations Cassiopeia, Perseus, Taurus, Monoceros, Vela, Crux, Norma, Sagittarius, Scutum, Aquila, Cygnus, and Lacerta.
Securing your Raspberry PI with SSL and Simple Authentication. Many of the home automation projects that I’ll be talking about on this blog will be controllable with a web browser.
Most of the projects will, in fact, be controlled with simple HTTP GET requests. VIDEO: Boater Catches Explosive Volcanic Eruption, Startling Sonic Boom on Camera. VIDEO: Boater Catches Explosive Volcanic Eruption, Startling Sonic Boom on Camera By Courtney Spamer, Meteorologist September 11, 2014; 4:46 AM ET Mount Tavurvur, a volcano in Papua New Guinea, erupted on Aug. 29, spewing ash and causing a shock wave and resultant sonic boom.
Projet LUXORION - Dossiers éducatifs. Dr. The Worldwide list of dissidents of Jean de Climont is covered by copyright.
It may be downloaded for personal use only in line with applicable regulations such as laws, international treaties, CE directives and agreements. Presentation The Worldwide list of dissident scientists has been issued from the data available in the Internet. Many individual dissident scientists have been found, but most of them are registered in many lists available in the Internet. Quelles sont les idées scientifiques à abandonner. Plasma Cosmology .net. Are stars powered from within, or does the power come from elsewhere?
This was the question asked by Sir Arthur Eddington in the 1920s. He settled for the former, and this laid the foundation for current mainstream models. Ralph Juergens asked the question again in the 1970s, and opted for the latter. According to Juergens, stars shine because they are connected to electric circuitry within galaxies. An electric star's brightness thus depends on the power of the electric current feeding it, not on the amount of nuclear fuel available to burn. Microsoft Word - Inertial System and Special Relativity-1.doc - 0512110.pdf. 111I01.full.pdf. PhysRevE_74_046406.pdf. Researchers Discover New Way to Probe Molecules and Atoms with an X-Ray Laser. In this illustration, an X-ray pulse (shown in green) at SLAC’s Linac Coherent Light Source strikes a neon atom (center) as it travels from the lower left.
The intense incoming light reshuffles electrons out of their original positions and into vacant positions around the atom. 125008.pdf. () - 0901.4837v1.pdf. Currents 22 - 1304.1276.pdf. Cluster finds source of aurora energy boost. Phys. Rev. A 87, 013808 (2013): Selection rules for angular momentum transfer via impulsive stimulated Raman scattering. [1307.7163] Resolution of Kantor and Babcock-Bergman Emission Theory Anomalies.
La tête au carré : l'émission des auditeurs #1. Roland Benabou, Theodore A. Wells' 29 Professor of Economics and Public Affairs. Researchers Teleport 10,000 Bits of Information in 1 Second. For the first time, researchers have teleported 10,000 bits of information per second from point A to point B across a distance of about six millimeters and inside a solid state circuit, similar to a computer chip.
Although the accomplishment differs from teleporting mass, like a person — such as that seen on science fiction shows like Star Trek — the remarkable feat demonstrates what could be possible with a quantum computer. The scientists, from the Swiss Federal Institute of Technology (ETH) in Zurich, report their findings in this week’s issue of Nature. In their experiment, the team spaced three micron-sized electronic circuits on a seven-by-seven-millimeter computer chip. Two of the circuits worked as a sending mechanism, while the other served as the receiver.
The scientists cooled the chip to near absolute zero and ran a current through the circuits. Specifically, the qubits in the sender circuit became entangled with those in the receiving circuit. Infinity Imagined. Race for cold fusion: Nasa, MIT, Darpa and Cern peer through the keyhole. Four months ago, Andrea Rossi demonstrated what he claims was a one-megawatt "Energy Catalyser" -- or E-Cat -- which produces power by cold fusion.
This technology, also known as Low Energy Nuclear Reaction (LENR), had been consigned to the deepest cellar of fringe science. Now it's hammering on the cellar door, and Nasa, MIT, Darpa and Cern are among those peering through the keyhole, wondering if it should be allowed back in with respectable science. As part of Wired.co.uk's continued coverage of progress in this controversial field, we have investigated recent developments.
Expérience de pensée. Etienne Klein : "La brisure de symétrie deviendra peut-être la règle en physique" Gravitation quantique à boucles - LQG - Loop Quantum Gravity - Gravitation quantique. La gravitation quantique à boucles est l'une des principales voies de recherche concernant le problème de l'élaboration d'une théorie capable de décrire l'aspect quantique de la gravitation.
Il faut en effet une théorie quantique de la gravitation lorsque l'on veut comprendre la naissance de l'univers et ce qui se passe à l'intérieur des trous noirs. Dans le cadre de la relativité générale classique, il apparaît alors dans ces situations des singularités avec des divergences de certaines quantités physiques indésirables. Atomes et miroir pour une expérience de pensée quantique d'Einstein.
Energie Plasmatique. Le plasma: 4ème état de la matière. IJL - Institut Jean Lamour - UMR 7198. Générateur éléctrique à plasma. Stockage. 10 Ways Quantum Physics Will Change the World. Quantum physics deals with the behavior of the smallest things in our universe: subatomic particles. It is a new science, only coming into its own in the early part of the 20th century, when physicists began questioning why they couldn't explain certain radiation effects. One of those pioneering thinkers, Max Planck, used the term "quanta" for the tiny particles of energy he was studying, hence the term "quantum physics" [source: PBS]. Quantum. Supraconductivité, la revanche des électrons - La Grande Équation. Ce phénomène continue de fasciner les physiciens, encore aujourd’hui. Www-instn.cea.fr/IMG/pdf_Master_MSE_R-Michel.pdf. Supraconductivité. Magnétisme: Matériaux et applications. Magnétisme Et Supraconductivité - Laurent-Patrick Lévy.
Supraconductivité à température ambiante : des signes dans le graphite. Comme l’avoue lui-même l’un des auteurs de l’article publié dans Advanced Materials , cela semble de la science-fiction : du graphite convenablement préparé exhibe des signes d’un état supraconducteur jusqu’à une température d’au moins… 130 °C ! Il manque encore des éléments pour affirmer qu'il s'agit bien d’un supraconducteur à température ambiante.
Mais si tel était le cas, une révolution technologique serait en marche .
Sortir du Nucléaire.../ No to nucleaire energy. Les cosmologies alternatives. Les cosmologies alternatives Le modèle plasma L’univers plasma ou électromagnétique de Hannes Alfvén[7] part du principe que la gravité n’est pas la seule force dominante de l’univers, régissant tant la théorie du Big Bang que le taux d’expansion de l’Univers. En effet, une autre interaction, la force électromagnétique a une portée aussi grande que la gravitation et est même 1039 fois plus intense que sa consoeur à l’échelle moléculaire. H.Alfvén considère que l’univers peut être décrit en termes magnétiques, alliant la gravitation et l’électromagnétisme. Nous savons que la physique des plasmas constitue un domaine très important des sciences. Sciences. Brisure spontanée de symétrie.
Un article de Wikipédia, l'encyclopédie libre. En physique, le terme brisure spontanée de symétrie renvoie au fait que, sous certaines conditions, certaines propriétés de la matière ne semblent pas respecter les équations décrivant le mouvement des particules (on dit qu'elles n'ont pas les mêmes symétries). Cette incohérence n'est qu'apparente et ne signifie pas que les équations soient fausses. Etienne Klein - La brisure de symétrie, Prix Nobel de Physique 2008. Astronomie.