The revolutionary discovery that the expansion of the universe is speeding up, not slowing down from gravity, means that 75 percent of our universe consists of mysterious dark energy. Berkeley Lab theoretical physicist Eric Linder delves into the mystery of dark energy as part of the Science in the Theatre lecture series on Nov. 24, 2008.
Showing posts with label dark matter. Show all posts
Showing posts with label dark matter. Show all posts
7.6.11
Q- What is The Dark Matter & Dark Energy 1
In astronomy and cosmology, dark matter is a hypothetical form of matter that is undetectable by its emitted electromagnetic radiation, but whose presence can be inferred from gravitational effects on visible matter.[1] According to present observations of structures larger than galaxies, as well as Big Bang cosmology, dark matter and dark energy could account for the vast majority of the mass in the observable universe.
The Dark Matter Mystery
The Mystery of Dark Matter:
Stars Are Moving Too Fast. (Chapter 1/4) A mystery exists! Galaxies do not seem to have enough mass for stars to orbit at their observed speeds. Galaxies should be flying apart, but they don't. Why not? Explore the surreal world of dark matter - one of the universe's greatest mysteries.
A mystery exists!(Chapter 2/4) Galaxies do not seem to have enough mass for stars to orbit at their observed speeds. Galaxies should be flying apart, but they don't. Why not? Explore the surreal world of dark matter - one of the universe's greatest mysteries.
The Mystery of Dark Matter (Chapter 3/4): Gravitational Lensing. A mystery exists! Galaxies do not seem to have enough mass for stars to orbit at their observed speeds. Galaxies should be flying apart, but they don't. Why not? Explore the surreal world of dark matter - one of the universe's greatest mysteries.
Stars Are Moving Too Fast. (Chapter 1/4) A mystery exists! Galaxies do not seem to have enough mass for stars to orbit at their observed speeds. Galaxies should be flying apart, but they don't. Why not? Explore the surreal world of dark matter - one of the universe's greatest mysteries.
A mystery exists!(Chapter 2/4) Galaxies do not seem to have enough mass for stars to orbit at their observed speeds. Galaxies should be flying apart, but they don't. Why not? Explore the surreal world of dark matter - one of the universe's greatest mysteries.
The Mystery of Dark Matter (Chapter 3/4): Gravitational Lensing. A mystery exists! Galaxies do not seem to have enough mass for stars to orbit at their observed speeds. Galaxies should be flying apart, but they don't. Why not? Explore the surreal world of dark matter - one of the universe's greatest mysteries.
The Dark Matter & Dark Energy [1/5]
Dark matter are invisible objects that react with matter by gravitational force. Scientists believe that the dark matter is made up of exotic particles like WIMPs(Weakly Interacting Massive Particles).In physical cosmology, dark energy is an exotic form of energy that permeates all of space and tends to increase the rate of expansion of the universe.Dark energy is the most popular way to explain recent observations that the universe appears to be expanding at an accelerating rate. In the standard model of cosmology, dark energy currently accounts for 73% of the total mass-energy of the universe.
Mysteries of the Dark Universe - 2009 Buhl Lecture
Edward W. Kolb (known to most as "Rocky") gave the 2009 Buhl Lecture, sponsored by the Carnegie Mellon Department of Physics. In his lecture "Mysteries of the Dark Universe", Kolb talks about how most of the universe is in a mysterious form called dark matter and most of the energy in the universe is in an even more mysterious form called dark energy. In the next decade, the combination of new astronomical facilities, powerful particle accelerators and sensitive laboratory experiments promises to unlock the secrets of dark matter and dark energy, connecting the inner-space of the quantum with the outer space of the cosmos.
Kolb is the Arthur Holly Compton distinguished Service Professor of Astronomy & Astrophysics. In addition to more than 200 scientific papers, he is a co-author of The Early Universe, the standard textbook on particle physics and cosmology. He is the chair of the Department of Astronomy & Astrophysics at the University of Chicago.
For more, visit: http://www.phys.cmu.edu/
Kolb is the Arthur Holly Compton distinguished Service Professor of Astronomy & Astrophysics. In addition to more than 200 scientific papers, he is a co-author of The Early Universe, the standard textbook on particle physics and cosmology. He is the chair of the Department of Astronomy & Astrophysics at the University of Chicago.
For more, visit: http://www.phys.cmu.edu/
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