http://www.netvouz.com/pdboyer/tag/gravity?feed=rss pdboyer's bookmarks tagged "gravity" on Netvouz http://www.sas.upenn.edu/home/news/troddenandabbate/trodden.html Research summary of old notions of the expanding universe and newer approach to explain how galaxies can to continue moving away from each other at ever-increasing velocities. Talks about Einstein's general theory of relativity -- movement being a curvature of space/time continuum (or something like this) pdboyer Sat, 06 Nov 2010 00:14:19 GMT http://amazing-space.stsci.edu/capture/ Black holes Comets & asteroids Electromagnetic spectrum/ Light and color Galaxies Gravity History of science Hubble Space Telescope Solar system Stars & stellar evolution pdboyer Sat, 06 Nov 2010 20:49:46 GMT http://science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy/ Eventually theorists came up with three sorts of explanations. Maybe it was a result of a long-discarded version of Einstein's theory of gravity, one that contained what was called a "cosmological constant." Maybe there was some strange kind of energy-fluid that filled space. Maybe there is something wrong with Einstein's theory of gravity and a new theory could include some kind of field that creates this cosmic acceleration. Theorists still don't know what the correct explanation is, but they have given the solution a name. It is called dark energy. pdboyer Sat, 06 Nov 2010 19:44:07 GMT http://www.fearofphysics.com/index1.html See physics in action with graphics and animation pdboyer Sat, 01 Jan 2011 18:11:21 GMT