News CFHT - Astronomers reach new frontiers of dark matter. For the first time, astronomers have mapped dark matter on the largest scale ever observed.
The results, presented by Dr Catherine Heymans of the University of Edinburgh, Scotland, and Associate Professor Ludovic Van Waerbeke of the University of British Columbia, Vancouver, Canada, are being presented today to the American Astronomical Society meeting in Austin, Texas. Their findings reveal a Universe comprised of an intricate cosmic web of dark matter and galaxies that spans more than one billion light years. An international team of researchers lead by Van Waerbeke and Heymans achieved their results by analysing images of about 10 million galaxies in four different regions of the sky. They studied the distortion of the light emitted from these galaxies, which is bent as it passes massive clumps of dark matter during its journey to Earth. Galaxies included in the survey are typically six billion light years away.
Contacts: Mysteries of Deep Space - History of the Universe Timeline. Celestia: Home. EarthLOS. 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. 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). 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. Tycho Brahe Planetarium - Home. Tycho Brahe. All That Is Interesting - Visualizing The Size And Scale Of Our World. Space Science - Herschel detects abundant water in planet-forming disc. Herschel detects abundant water in planet-forming disc Detection of water vapour in the spectrum of TW Hydrae's protoplanetary disc 20 October 2011 ESA’s Herschel space observatory has found evidence of water vapour emanating from ice on dust grains in the disc around a young star, revealing a hidden ice reservoir the size of thousands of oceans.
TW Hydrae, a star between 5-10 million years old, and only 176 light-years away, is in the final stage of formation, and is surrounded by a disc of dust and gas that may condense to form a complete set of planets. It is believed that a large proportion of Earth’s water may have come from ice-laden comets that bombarded our world during and after its formation. This new detection is the first of its kind and has been made possible by Herschel’s HIFI instrument.
"These comets we believe became a contributing source of water for the planets. " ASTR 1230, Whittle [Fall 2009]. Lecture Notes. Kitten Vs Two Scary&Things - Home - Staple News. - StumbleUpon. Astronomy. - StumbleUpon. Astronomy For Beginners...Astronomy Basics...Amazing Astronomy Facts - StumbleUpon. Photopic Sky Survey - StumbleUpon. Wallpaper. Hubble Heritage Gallery of Images - StumbleUpon.