Using data from NASA's Fermi Gamma-ray Space Telescope, scientists have recently discovered a gigantic, mysterious structure in our galaxy. This feature looks like a pair of bubbles extending above and below our galaxy's center. Each lobe is 25,000 light-years tall and the whole structure may be only a few million years old.
What kind of power would you need to overcome this obstacle? Why is this such a difficult thing to do? Well, a ninja trying to climb this ladder not only has to do something like a pull-up (no easy feat) he has to end the pull-up with enough vertical velocity so that he can be “airborne” long enough for him to move the bar to the next level. Really, this is the part that makes it tough and this is the part that I want to calculate the power for. Let’s go.
Ferrofluid is a very interesting material originally developed by NASA it has now found itself been used for a whole range of devices including dampers for controlling and stabilizing large building that move around in the wind. It is amazing...
@ Cornell University, video shows six laboratory demonstrations of chaos and nonlinear phenomena, intended for use in a first course on nonlinear dynamics. Steven Strogatz explains the principles being illustrated and why they are important.
The NOVA mini-series The Elegant Universe, watch all three one hour episodes here, divided into chapters, available in the QuickTime or RealPlayer plug-ins.
astrophysicist John Dubinski's self-published DVD containing his stunning supercomputer simulations of galactic evolution set to Bach music. "... Gravitas points clearly at ties between the ideas of Isaac Newton and the music of Bach. To do this with sounds and images that appeal to club kids and new music fans equally is a major achievement." - John Terauds, Toronto Star, March, 9 2006
a not-for-profit organization with videos on YouTube covering everything from basic arithmetic and algebra to differential equations, physics, chemistry, biology and finance which have been recorded by Salman Khan
MIT Professor Walter Lewin, Physics, Classical Mechanics, Lecture No. 08: Friction
This lecture deals exclusively with frictional forces.
Prof. Lewin demonstrates a strange experiment, where a flea is moving a thick book.
via Yovisto / Osotis
MIT Professor Walter Lewin, Physics, Classical Mechanics, Lecture No. 07: Weight and Weightlessness
This lecture explores weight, perceived gravity, weightlessness, free fall, zero perceived gravity in orbit.
via Yovisto / Osotis
MIT Professor Walter Lewin, Physics, Classical Mechanics, Lecture No. 06: Newton's Laws
This lecture is all about Newton's First (inertia), Second (F=ma) and Third (action=-reaction) Laws.
via Yovisto / Osotis
IN 1999, legendary theoretical physicist Hans Bethe delivered three lectures on quantum theory to his neighbors at the Kendal of Ithaca retirement community (near Cornell University). Given by Professor Bethe at age 93, the lectures are presented here as
"NOVA is the most watched science television series in the world and the most watched documentary series on PBS. It is also one of television's most acclaimed series, having won every major television award, most of them many times over"