Astro Bob | Celestial happenings you can see from your own backyard NEAR-EARTH ASTEROID TRACKING Physique moderne et philosophie [Podcast] - Centre Atlantique de Philosophie Vincent Jullien et Bruno Gnassounou organisent deux conférences présentées par deux jeunes chercheurs en physique et/ou philosophie sur des questions philosophiques de la physique contemporaine. Qu’est-ce qu’un modèle en physique ? Mardi 16 mars 16h30, Salle 334, Campus du Tertre. Manuel Combes, Centre Européen de Réalité Virtuelle Brest. LISyC, Brest. Comment l’utilise-t-on et quelles sont ses limites ? Podcast Conférence de Manuel Combes au Centre Atlantique de Philosophie : télécharger ce mp3 Vous trouverez ci-dessous les diaporamas utilisés par Manuel Combes lors de sa conférence. Une introduction aux enjeux philosophiques en mécanique quantique Mardi 30 Mars 16h30, Salle 334, Campus du Tertre. La mécanique quantique est la théorie physique actuelle qui rend compte des phénomènes atomiques. Conférence de Thomas Boyer au Centre Atlantique de Philosophie : télécharger ce mp3 Vous trouverez ci-dessous le diaporama utilisé par Thomas Boyer lors de sa conférence.
Solar System, Solar System Information, Facts, News, Photos -- National Geographic Our Cosmic Neighborhood From our small world we have gazed upon the cosmic ocean for thousands of years. Ancient astronomers observed points of light that appeared to move among the stars. Since the invention of the telescope, three more planets have been discovered in our solar system: Uranus (1781), Neptune (1846), and, now downgraded to a dwarf planet, Pluto (1930). The four planets closest to the sun—Mercury, Venus, Earth, and Mars—are called the terrestrial planets because they have solid rocky surfaces. Nearly every planet—and some of the moons—has an atmosphere. Moons, Rings, and Magnetospheres There are 140 known natural satellites, also called moons, in orbit around the various planets in our solar system, ranging from bodies larger than our own moon to small pieces of debris. From 1610 to 1977, Saturn was thought to be the only planet with rings. Most of the planets also have magnetic fields, which extend into space and form a magnetosphere around each planet.
The Beginning of the Universe and the Limit of Knowledge “Despite its name, the big bang theory is not really a theory of a bang at all. It is really only a theory of the aftermath of a bang.” -Alan Guth So you finally understand it. The Big Bang tells us that the Universe was hotter, denser, and expanding at a faster rate in the past. Image credit: original source unknown. The farther back we go, the closer together everything was, the higher in temperature (and shorter in wavelength) all the radiation was, and — of course — the younger the Universe was. Image credit: Ned Wright (possibly Will Kinney, too), via At some point, it was hot enough that neutral atoms couldn’t even form; as soon as an electron would find an atomic nucleus, a high-enough-energy photon would come along and ionize the atom’s constituents. Image credit: Lawrence Berkeley National Laboratory. Image credit: Ned Wright. Inflation is a period of time where the Universe was expanding exponentially. Image credit: Cosmic Inflation by Don Dixon.
PocketSpacecraft.com | Open source open access personal space exploration DocSciences Le CNES s'est associé au C.R.D.P de l’académie de Versailles pour une série de numéros "Espace" de DocSciences, une nouvelle revue scientifique pour actualiser ses connaissances. DocSciences offre un solide dossier de culture scientifique et des ouvertures d’adaptations pédagogiques. Cette revue s’adresse plus précisément aux enseignants de cycle 3 en école élémentaire et aux professeurs de collège en SVT, physique-chimie, technologie et histoire-géographie. Elle propose des articles enrichis de nombreuses illustrations, accompagnées de légendes à double niveau de lecture : professeurs et élèves DocSciences propose : une approche pédagogique originale de documents scientifiques commentés à la fois par des spécialistes et des professeurs, adaptée à plusieurs niveaux, un prolongement sur internet : animations, pistes pédagogiques croisées avec les thèmes aux programmes, portfolios, etc...
Solar System Planets: Order of the 8 (or 9) Planets Ever since the discovery of Pluto in 1930, kids grew up learning about the nine planets of our solar system. That all changed starting in the late 1990s, when astronomers began to argue about whether Pluto was a planet. In a highly controversial decision, the International Astronomical Union ultimately decided in 2006 to call Pluto a "dwarf planet," reducing the list of "real planets" in our solar system to eight. However, astronomers are now hunting for another planet in our solar system, a true ninth planet, after evidence of its existence was unveiled on Jan. 20, 2016. Did You Know? Here's the order of the planets, starting nearest the sun and working outward through the solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune — and Planet Nine. Solar System Pictures: A Photo Tour The inner four worlds are called “terrestrial planets,” because, like Earth, their surfaces are all rocky. The closest planet to the sun, Mercury is only a bit larger than Earth's moon.
Time Machines and Event Horizons » Undivided Looking I've written a pop-article about Time Machines and Event Horizons, which has appeared on the Scientific American blog Critical Opalescence. George Musser, my host, is an editor at Scientific American, and kindly gave me this opportunity to talk about some of my ideas in my article, The Generalized Second Law implies a Quantum Singularity Theorem. If you have any questions about the physics in the article, please feel free to leave comments on this post here. (Questions left on the Scientific American website will be answered in the comments to this post, if anywhere.) I am a postdoctoral researcher studying quantum gravity and black hole thermodynamics at the Institute for Advanced Study in Princeton. Before that, I read Great Books at St.
Solar System Visualization Project Solar System Visualization(SSV) ProjectScience Collaboration Testbed (SCT) Task Significant and Additional Content: Mars Science Update - Mars: An Active Planet Today? Malin Space Science Systems Super Resolution Mars Pathfinder Pan by Tim Parker MVACS Processing flow diagram by David A. (Click image to see the entire diagram) Mars Polar Lander Demo Page Prototype DemonstrationsThe links and images which follow are "story-board" mockups of proposed web pages, tools, and environments.
L'homme sur Mars : Les contraintes d'un voyage vers Mars Une mission humaine vers Mars pose de nombreux problèmes. On ne peut pas en effet prévoir, dans l'état actuel de nos connaissances, les effets sur un organisme humain d'un vol aussi prolongé que le vol vers Mars. En moyenne, un aller simple vers Mars prend entre 6 à 9 mois. L'homme n'a pas séjourné plus de 14 mois dans l'espace, ce record étant détenu par le cosmonaute Valeri Poliakof à bord de la station spatiale Mir. Cela indique certes que l'homme doit pouvoir supporter sans trop de dommage un voyage vers Mars, mais cela ne nous donne aucune indication sur ce qu'il risque de subir et d'éprouver une fois à la surface de la planète rouge. Que savons nous finalement d'un vol prolongé en absence de pesanteur, des conditions de travail à la surface de Mars et de la capacité des astronautes à supporter un retour à la gravité terrestre après un séjour de plusieurs années dans l'espace ? Gravité zéro ! Le mal de l'espace Fragilisation des os Atrophie musculaire Action sur le système respiratoire
BBC Solar System - Tour the Sun and planets with stunning video clips 125 Great Science Videos: From Astronomy to Physics & Psychology Astronomy & Space Travel A Brief, Wondrous Tour of Earth (From Outer Space) - Video - Recorded from August to October, 2011 at the International Space Station, this HD footage offers a brilliant tour of our planet and stunning views of the aurora borealis.A Universe from Nothing - Video - In 53 minutes, theoretical physicist Lawrence Krauss answers some big enchilada questions, including how the universe came from nothing.A Year of the Moon in 2.5 Minutes - Video - The Lunar Reconnaissance Orbiter has been orbiting the moon for over a year. The footage gets compressed into 2 slick minutes.A Day on Earth (as Seen From Space) - Video - Astronaut Don Pettit trained his camera on planet Earth, took a photo once every 15 seconds, and then created a brilliant time-lapse film.Atlantis's Final Landing at Kennedy Space Center - Video - After more than 30 years, the space shuttle era comes to a close. Video runs 30 minutes. Physics Biology & Chemistry Environment, Geology and & Ecology