Physics
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physics
Feynman
Earth Image Archive
This is a picture of the Earth's magnetic field and the Van Allen Belts. The Van Allen Belts are two layers where the atomic particles are trapped and the magnetosphere is dense. This is another image of the magnetosphere. Here you can see the interaction between the solar wind and the earth's magnetic field. This infrared image of the Earth was taken by the GOES 6 satellite on September 21, 1986.
the European Organization for Nuclear Research
The Moebius Strip © Cie Gilles Jobin 2007 (Image: Dorothée Thébert) The first Collide@CERN-Geneva prize in Dance and Performance was today awarded by jury to the 47-year-old Swiss-born dancer and choreographer Gilles Jobin for his proposal to use interventions and dance to explore the relationship between mind and body at the world's largest particle physics laboratory. Grand opening today of CERN travelling exhibition 'Accelerating Science' in Ankara, Turkey: https://t.co/Olw3Hdg8 http://t.co/OdTJweHJ Mon 02 Apr
Robonaut: Home
Robonaut 2 is one step closer to earning its keep on the International Space Station. R2 got its first taste of real work on Wednesday. The crew and ground team had completed all its initial checkouts, and Tuesday installed heat sinks in both of the robot’s forearms to allow it to better dissipate heat and work for longer periods of time. The first humanoid robot in space was sent to the space station with the intention of eventually taking over tasks too dangerous or mundane for astronauts, and the first such task identified for it was monitoring air velocity. Astronauts onboard the space station generally have to measure the air flow in front of vents inside the station to ensure that none of the ventilation ductwork gets clogged or blocked. The task involves holding a gauge in front of vents in five different locations on the station and taking several measurements of the air flow every 90 days or so.
But as applied and engineering physics professor Joel D. Brock comments in the Feb. 2 issue of Science, a new generation of X-ray sources is allowing scientists to watch atoms move. In his short paper, "Watching Atoms Move," Brock explains how scientists' understanding of matter is changing. The paper describes an international research collaboration based on a prototype X-ray machine at Stanford University.
Watching atoms move
Spinoff homepage
Spinoff 2011: NASA Technologies Benefit Society Spinoff 2011 presents remarkable examples of spinoffs providing benefits around the world—saving lives, creating jobs, preserving resources, and more.
IEM | News & Notes
Back on 6 May 2007, I was fortunate to captured a spectacular timelapse from the KCCI-TV webcam located at Meswaki Settlement School near Tama, Iowa. This video recently exceeded 1 million views on YouTube, which is great for a timelapse of clouds! :) Two colleagues from the University of Alabama in Huntsville and I wrote up a paper on this timelapse and the article is published in the August edition of Journal of Atmospheric and Oceanic Technology.The Wilkinson Microwave Anisotropy Probe (WMAP) is a NASA Explorer mission that launched June 2001 to make fundamental measurements of cosmology -- the study of the properties of our universe as a whole. WMAP has been stunningly successful, producing our new Standard Model of Cosmology. WMAP's data stream has ended. Full analysis of the data will be completed in the remaining two years of the mission.
Wilkinson Microwave Anisotropy Probe (WMAP)
Immerse yourself in a seamless beautiful environment. From web to desktop to full dome planetarium, WorldWide Telescope (WWT) enables you to explore the universe, bringing together imagery from the best ground and space-based telescopes in the world and combining it with 3D navigation. Experience narrated guided tours from astronomers and educators featuring interesting places in the sky. You can research and import your own data and visualize it, then create a tour to share with others. A web-based version of WorldWide Telescope is also available. This version enables seamless, guided explorations of the universe from within a web browser on PC and Intel Mac OS X by using the power of Microsoft Silverlight 4.0.
WorldWide Telescope
Free Electron Laser - Wiggler Magnet
Free Electron Laser - Wiggler Magnet As the electron beam passes between the copper colored magnets, it changes directions. The poles of the magnets alternate, so the electron beam is forced to wiggle up and down. Any wiggling electric charge emits electromagnetic radiation. The type of electromagnetic radiation produced depends on how quickly the charge wiggles. Slower wiggles can make radio waves or microwaves, while faster wiggles can make x-rays.
Ionization of atoms or molecules by an intense femtosecond (1 fs = 10 -15 s) laser is at the basis of a large number of processes that are extensively studied and exploited around the world. An important example is the popular technique of high harmonic generation, where laser light at near-infrared wavelengths is converted into extreme-ultraviolet (EUV) or soft X-ray light, thereby producing the shortest man-made light pulses, which extend down into the attosecond domain (1 as = 10 -18 s). A remarkable aspect of existing theories describing strong field ionization is that they base themselves on the assumption that the laser only interacts with the most weakly-bound electron in the atom or molecule. This approximation is very counter-intuitive when one considers that atoms or molecules commonly contain many equivalent or nearly equivalent electrons.
