DaylightMap Animations Animation:Angular diameter distance scaling with curvature and lambda (&OmegaK=1-&Omegam-&Omega&Lambda, fixed &Omegamh2 and &Omegabh2) Black holes were first identified in Einsteins general relativity Ask any kid about the coolest thing they've learned in science. If they're still in elementary school, they'll tell you about dinosaurs, particularly the T Rex. By the time they're in middle school, however, a different kind of carnivore will be high on their list. But this one doesn't have legs and nine inch teeth. This monster preys on galaxies. German astrophysicist Karl Schwarzschild calculated the first rigorous solution to the field equations in Albert Einstein's theory of general relativity while serving on the Russian front during World War 1. When Einstein developed relativity theory, it took him about ten years to work out the math using a daunting form of mathematics called tensor calculus. Schwarzschild was also a German patriot, so he set aside his astronomical studies when World War 1 erupted and enlisted in the army. Significantly, it provided support for a, then, seemingly implausible situation about the effects of severely compressed matter on gravity and energy.
Daylight Hrs 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: Edad del Universo La edad del Universo, de acuerdo con la Teoría del Big Bang, es el tiempo transcurrido desde el Big Bang hasta el presente. El consenso de los científicos contemporáneos es de unos 13,798 ± 0,037 miles de millones de años,[1] es decir que la edad del universo está comprendida entre 13.761 y 13.835 millones de años. En la ciencia moderna el modelo más prudente (y ampliamente aceptado) de la formación del Universo es el Big Bang. La Teoría del Big Bang no especula sobre qué puede haber existido «antes», incluso si esta pregunta tiene algún sentido. Sin embargo hay alternativas. Hay siempre una ambigüedad en la relatividad especial y la relatividad general definiendo de forma precisa que se entiende por tiempo entre dos eventos. ) que aparece en la métrica. Edad basada en los resultados del WMAP[editar] El proyecto WMAP de la NASA estimó la edad del Universo en: (13,7 ± 0,2) × 109 años. Esto es, el Universo tiene unos 13.700 millones de años,[2] con una incertidumbre de 200 millones de años. y
Black Holes Click here to go to the JPU200Y home page. Click here to go to the Physics Virtual Bookshelf Click here to go to the UPSCALE home page. Introduction: "A luminous star, of the same density as the Earth, and whose diameter should be two hundred and fifty times larger than that of the Sun, would not, in consequence of its attraction, allow any of its rays to arrive at us; it is therefore possible that the largest luminous bodies in the universe may, through this cause, be invisible." -- Pierre Laplace, The System of the World, Book 5, Chapter VI (1798). Evolution of Stars Clouds of Hydrogen begin condensing into more dense clusters due to gravitation. When this "fuel" is exhausted, there are three possible outcomes, depending on the total mass of the star: If the mass of the star is less than about 1.2 solar masses, the star becomes a spinning ball of dead slag, gradually cooling down as it radiates away its thermal energy. Another Approach to Black Holes The Wormhole Solution -- e.e. cummings
Cosmology 10 Strange Things About The Universe Space The universe can be a very strange place. While groundbreaking ideas such as quantum theory, relativity and even the Earth going around the Sun might be commonly accepted now, science still continues to show that the universe contains things you might find it difficult to believe, and even more difficult to get your head around. Theoretically, the lowest temperature that can be achieved is absolute zero, exactly ?273.15°C, where the motion of all particles stops completely. One of the properties of a negative-energy vacuum is that light actually travels faster in it than it does in a normal vacuum, something that may one day allow people to travel faster than the speed of light in a kind of negative-energy vacuum bubble. One prediction of Einstein’s theory of general relativity is that when a large object moves, it drags the space-time around it, causing nearby objects to be pulled along as well. Relativity of Simultaneity This is similar to arranging tiles evenly on a floor.
10 Awesome Online Classes You Can Take For Free Cool, but you need iTunes for nearly everything, and that gets an 'F.' Are there really no other places to get these lessons? I was sure there are some on Academic Earth. Flagged 1. 7 of them are available via YouTube. 2. iTunes is free. 1. 2. Don't worry, we're looking out for you! While I have no personal beef with iTunes, I know that many people share your sentiments — so I actually made a concerted effort to include relevant youtube links when possible.
3D Solar System