Radio telescopes capture best-ever snapshot of black hole jets An international team, including NASA-funded researchers, using radio telescopes located throughout the Southern Hemisphere has produced the most detailed image of particle jets erupting from a supermassive black hole in a nearby galaxy. "These jets arise as infalling matter approaches the black hole, but we don't yet know the details of how they form and maintain themselves," said Cornelia Mueller, the study's lead author and a doctoral student at the University of Erlangen-Nuremberg in Germany. The new image shows a region less than 4.2 light-years across -- less than the distance between our sun and the nearest star. Radio-emitting features as small as 15 light-days can be seen, making this the highest-resolution view of galactic jets ever made. Mueller and her team targeted Centaurus A (Cen A), a nearby galaxy with a supermassive black hole weighing 55 million times the sun's mass. These lobes are filled with matter streaming from particle jets near the galaxy's central black hole.
Nanotechnology Just give me the FAQ The next few paragraphs provide a brief introduction to the core concepts of nanotechnology, followed by links to further reading. Manufactured products are made from atoms. The properties of those products depend on how those atoms are arranged. If we rearrange the atoms in coal we can make diamond. If we rearrange the atoms in sand (and add a few other trace elements) we can make computer chips. If we rearrange the atoms in dirt, water and air we can make potatoes. Todays manufacturing methods are very crude at the molecular level. It's like trying to make things out of LEGO blocks with boxing gloves on your hands. In the future, nanotechnology (more specifically, molecular nanotechnology or MNT) will let us take off the boxing gloves. "Nanotechnology" has become something of a buzzword and is applied to many products and technologies that are often largely unrelated to molecular nanotechnology. Nanotechnology will let us: Some Frequently Asked Questions More Information Books
Tourisme spatial : trop haut pour être vrai ? La promesse d'un espace bientôt accessible à tous... ou presque. C'est depuis une décennie l'objectif de quelques sociétés privées, qui annoncent toucher au but malgré de nombreux retards techniques. D'autres voient encore plus loin en imaginant, par exemple, un vaisseau qui relierait Londres à Hongkong... en quatre-vingt-dix minutes. LE MONDE SCIENCE ET TECHNO | • Mis à jour le | Par Olivier Dessibourg ("Le Temps") Démocratiser l'accès à l'espace ; permettre à chacun de voir du ciel la courbure de la Terre, d'expérimenter l'apesanteur ; ou, pour les scientifiques, lancer à moindre coût des petits satellites. Des initiatives similaires existent déjà. Mais c'est entre ces deux paliers, juste au-delà de la ligne de Karman - cette "frontière" de l'espace située à 100 km du sol -, que quelques compagnies veulent emmener leurs passagers. La première à avoir affiché ses ambitions fut Virgin Galactic, fondée par le milliardaire Richard Branson.
LIVE REAL TIME SATELLITE AND SPACE SHUTTLE TRACKING AND PREDICTIONS LiftPort Space Elevator - LiftPort v2.0! Virgin Galactic, the world's first commercial spaceline Daylight Hours Explorer Shows the hours of daylight received during the year for an observer at a given latitude. This is an important factor contributing to the seasons. Running this animation on your computer... right-click to download daylighthoursexplorer.swf and daylighthoursexplorer.html to the same directory open the html file in a browser to run the animation Linking to this animation... copy and paste the code below into your webpage or blog: Putting this animation on your website... upload daylighthoursexplorer.swf to the same directory as your webpage copy and paste the following code into your webpage:
Brain Explorer Tourisme spatial Un article de Wikipédia, l'encyclopédie libre. Courbure de la terre vue de l'espace Concepts[modifier | modifier le code] Vol orbital et surborbital[modifier | modifier le code] De manière conventionnelle on considère qu'un séjour dans l'espace nécessite de dépasser l'altitude de 100 km (ligne de Karman). Les défis techniques du vol suborbital[modifier | modifier le code] Historique[modifier | modifier le code] Premiers vols de touristes spatiaux à bord de la station spatiale internationale[modifier | modifier le code] Le projet de Virgin Galactic[modifier | modifier le code] La société Virgin Galactic de Richard Branson, créée en 2004 propose, quant à elle, d'emmener des touristes pour un vol suborbital à plus de 100 km d'altitude (altitude retenue de manière arbitraire comme étant la limite inférieure d'un vol spatial) à bord d'un avion spécialement conçu à cette fin. Autres sociétés ayant des projets de tourisme spatial[modifier | modifier le code] Dennis Tito : du 28 avril au 6 mai 2001.
Physics 20b: Introduction to Cosmology - Spring 2010 - Download free content from UC Irvine