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Minnesota dark matter researchers say they may have struck gold - Minneapolis / St. Paul News - City Pages - The Blotter
"The rumors we reported may be true: Dark matter may have been found for at the Soudan Underground Lab particle physics laboratory's Cryogenic Dark Matter Search project. The facility, run by the University of Minnesota, is about 225 miles north of Minneapolis, between Virginia and Ely.
It's big deal because scientists believe dark matter, believed to make up 90 percent of the universe, is a missing link in the effort to understand the big bang theory behind the creation of the universe. It's been detected in space. But it's never been detected on Earth.
The experts who study such theories "suggest that dark matter may be composed of Weakly Interacting Massive Particles (WIMPs)." "
The 10 weirdest physics facts, from relativity to quantum physics - Telegraph
"People who think science is dull are wrong. Here are 10 reasons why. "
Big Bang Theory
The Big Bang theory is an effort to explain what happened at the very beginning of our universe. Discoveries in astronomy and physics have shown beyond a reasonable doubt that our universe did in fact have a beginning. Prior to that moment there was nothing; during and after that moment there was something: our universe. The big bang theory is an effort to explain what happened during and after that moment.
ASP: A Universe from Nothing
Insights from modern physics suggest that our wondrous universe may be the ultimate free lunch.
In the inflationary theory, matter, antimatter, and photons were produced by the energy of the false vacuum, which was released following the phase transition. All of these particles consist of positive energy. This energy, however, is exactly balanced by the negative gravitational energy of everything pulling on everything else. In other words, the total energy of the universe is zero! It is remarkable that the universe consists of essentially nothing, but (fortunately for us) in positive and negative parts. You can easily see that gravity is associated with negative energy: If you drop a ball from rest (defined to be a state of zero energy), it gains energy of motion (kinetic energy) as it falls. But this gain is exactly balanced by a larger negative gravitational energy as it comes closer to Earth’s center, so the sum of the two energies remains zero.
What happened before the Big Bang
A team of astrophysicists at the California Institute of Technology (Caltech) has said that their new theoretical interpretation of an imprint from the earliest stages of the universe may also shed light on what came before the Big Bang.
Its no longer completely crazy to ask what happened before the Big Bang, said Marc Kamionkowski, Caltechs Robinson Professor of Theoretical Physics and Astrophysics.
Shrinking star puzzles scientists - CNN.com
Almost the brightest star in the Orion constellation and visible to the naked eye, Betelgeuse (pronounced "beetle juice") has shrunk 15 percent over 15 years, and scientists have said they have no idea why.
"We really don't know," said Nobel Prize-winning physicist Charles Townes. "It's a puzzle."
Big Bang - Wikipedia, the free encyclopedia
The Big Bang is a cosmological model of the initial conditions and subsequent development of the universe. It is supported by the most comprehensive and accurate explanations from current scientific evidence and observation.[1][2] As used by cosmologists, the term Big Bang generally refers to the idea that the universe has expanded from a primordial hot and dense initial condition at some finite time in the past, and continues to expand to this day.
Physical cosmology - Wikipedia, the free encyclopedia
Physical cosmology, as a branch of astronomy, is the study of the largest-scale structures and dynamics of our universe and is concerned with fundamental questions about its formation and evolution.[1] Cosmology involves itself with studying the motions of the celestial bodies and the first cause. For most of human history, it has been a branch of metaphysics and religion. Cosmology as a science originates with the Copernican principle, which implies that celestial bodies obey identical physical laws to those on earth, and Newtonian mechanics, which first allowed us to understand those motions. This is now called celestial mechanics. Physical cosmology, as it is now understood, began with the twentieth century development of Albert Einstein's general theory of relativity and better astronomical observations of extremely distant objects.
Three Lectures by Hans Bethe - Quantum Physics Made Ralatively Simple
Three Lectures by Hans Bethe
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 QuickTime videos synchronized with slides of his talking points and archival material.
Intended for an audience of Professor Bethe's neighbors at Kendal, the lectures hold appeal for experts and non-experts alike. The presentation makes use of limited mathematics while focusing on the personal and historical perspectives of one of the principal architects of quantum theory whose career in physics spans 75 years.
Academic Earth - Introduction to Astrophysics
This course focuses on three particularly interesting areas of astronomy that are advancing very rapidly: Extra-Solar Planets, Black Holes, and Dark Energy. Particular attention is paid to current projects that promise to improve our understanding significantly over the next few years. The course explores not just what is known, but what is currently not known, and how astronomers are going about trying to find out.
AP Physics | MIT OpenCourseWare - Free Online MIT Course Materials for High School
We have selected relevant material from MIT's introductory courses to support students as they study and educators as they teach the AP® Physics curriculum.
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