Usenet Physics FAQ Version Date: March 2013 This list of answers to frequently asked questions in physics was created by Scott Chase in 1992. Its purpose was to provide good answers to questions that had been discussed often in the sci.physics and related Internet news groups.
Russia to join European Mars mission MOSCOW, April 6 (UPI) -- Russia's space agency Roscosmos said it has agreed to participate in a Mars research project with the European Space Agency. The announcement came following a meeting between Roscosmos head Vladimir Popovkin and ESA chief Jean-Jacques Dordain in Moscow Friday. "The sides consider this project feasible and promising," Popovkin's spokeswoman Anna Vedishcheva told RIA Novosti. "The sides are to sign the deal by year-end." The final agreement on Russia's participation in ExoMars is expected to be signed in November "and by this date the sides should confirm their financing," a space industry source told RIA Novosti.
Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2016 April 15 Mercury and Crescent Moon Set Image Credit & Copyright: Miguel Claro (TWAN, Dark Sky Alqueva)
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:
Special Relativity Special Relativity These pages are ok as far as they go, but they are missing the planned highlight, to show you what things actually look like when you travel at near the speed of light. I hope to have the opportunity to develop these pages further as time permits. Here is my opinionated Guide to Special Relativistic Flight Simulator Sites. Meanwhile, these pages comprise an animated introduction to the elements of Special Relativity. Some of the fun stuff: Scientists use brain imaging to reveal the movies in our mind BERKELEY — Imagine tapping into the mind of a coma patient, or watching one’s own dream on YouTube. With a cutting-edge blend of brain imaging and computer simulation, scientists at the University of California, Berkeley, are bringing these futuristic scenarios within reach. Using functional Magnetic Resonance Imaging (fMRI) and computational models, UC Berkeley researchers have succeeded in decoding and reconstructing people’s dynamic visual experiences – in this case, watching Hollywood movie trailers. As yet, the technology can only reconstruct movie clips people have already viewed. However, the breakthrough paves the way for reproducing the movies inside our heads that no one else sees, such as dreams and memories, according to researchers. The approximate reconstruction (right) of a movie clip (left) is achieved through brain imaging and computer simulation
logy Magazine In new research, scientists have attempted to determine the precise conditions necessary for planets to form in a star system. Jarrett Johnson and Hui Li of Los Alamos National Laboratory assert that observations increasingly suggest that planet formation takes place in star systems with higher metallicities. Astronomers use the term “metallicity” in reference to elements heavier than hydrogen and helium, such as oxygen, silicon, and iron. In the “core accretion” model of planetary formation, a rocky core gradually forms when dust grains that make up the disk of material that surrounds a young star bang into each other to create small rocks known as “planetesimals”. Citing this model, Johnson and Li stress that heavier elements are necessary to form the dust grains and planetesimals which build planetary cores. Additionally, evidence suggests that the circumstellar disks of dust that surround young stars don’t survive as long when the stars have lower metallicities.
Sun`s path June to December « Helpmyphysics Last June I placed some photographic film into a tin cannister with a small hole punched into its side. The tin cannister was then attached to a clothes pole in my backgarden and left. This afternoon I fetched the cannister and took the photographic film out.