Clipmarks | taksmaster's 'cosmology' clips

Cosmic Voyage

Sat, 05 May 2007 02:24:10 GMT

clipped by: taksmaster

Clip Source: www.youtube.com

[Video]

Tags: universe, space, stars, science, cosmology, astronomy, planets

The Cosmology Quest - Challenging the Big Bang Theory

Mon, 12 Mar 2007 04:47:52 GMT

clipped by: taksmaster

Clip Source: video.google.com

[Video]

Clip Source: video.google.com

[Video]

Tags: physics, astronomy, cosmology, science, universe, space, electricity, einstein

Thunderbolts of the Gods - Plasma Cosmology

Mon, 12 Mar 2007 04:21:19 GMT

clipped by: taksmaster
clipper's remarks: A lesser known theory of cosmology that challenges the the big bang theory.

Clip Source: video.google.com

[Video]

Tags: big bang, astronomy, cosmology, physics, science

No Big Bang? Endless Universe Made Possible by New Model

Wed, 31 Jan 2007 05:45:59 GMT

clipped by: taksmaster

Clip Source: www.physorg.com

A new cosmological model demonstrates the universe can endlessly expand and contract, providing a rival to Big Bang theories and solving a thorny modern physics problem, according to University of North Carolina at Chapel Hill physicists.

The cyclic model proposed by Dr. Paul Frampton, Louis J. Rubin Jr. distinguished professor of physics in UNC's College of Arts & Sciences, and co-author Lauris Baum, a UNC graduate student in physics, has four key parts: expansion, turnaround, contraction and bounce.

Cosmologists first offered an oscillating universe model, with no beginning or end, as a Big Bang alternative in the 1930s. The idea was abandoned because the oscillations could not be reconciled with the rules of physics, including the second law of thermodynamics, Frampton said.

Tags: physics, cosmology, big bang, universe, space

Big Bang Losing Grip

Fri, 15 Dec 2006 01:59:32 GMT

clipped by: taksmaster

Clip Source: www.physorg.com

The light from galaxies in the background has been warped and “arced” by the galaxy cluster Abell 1689 in the foreground, and perhaps with some help by either dark matter or a stronger type of gravity on this large scale. Image Source: NASA, N. Benitez (JHU), T. Broadhurst (Racah Institute of Physics/The Hebrew University), H. Ford (JHU), M. Clampin (STScI),G. Hartig (STScI), G. Illingworth (UCO/Lick Observatory), the ACS Science Team and ESA.

In the standard theory of gravity—general relativity—dark matter plays a vital role, explaining many observations that the standard theory cannot explain by itself. But for 70 years, cosmologists have never observed dark matter, and the lack of direct observation has created skepticism about what is really out there.

Lately, some scientists have turned the question around, from “is dark matter correct?” to “is our standard theory of gravity correct?” Most recently, Fermilab scientists Scott Dodelson and former Brinson Fellow Michele Liguori demonstrated one of the first pieces of theoretical evidence that an alternative theory of gravity can explain the large scale structure of the universe.

“It is extremely important to see how well a no-dark-matter cosmology does,” said Dodelson. “[In the standard theory,] we are asking the community to believe in the existence of a particle that has never been seen. We have to be damned sure that you can't explain the universe without this huge leap. Our Figure 1 [see citation below] illustrates that, in standard gravity, a no-dark-matter model does not do well at all.”

Tags: physics, cosmology, science, astronomy, space

Brilliant Minds Forecast the Next 50 Years

Wed, 22 Nov 2006 12:16:28 GMT

clipped by: taksmaster

Clip Source: www.newscientist.com

Instant Expert: Brilliant Minds Forecast the Next 50 Years

What will be the biggest breakthrough of the next 50 years? As part of our 50^th anniversary celebrations we asked over 70 of the world's most brilliant scientists for their ideas.

In coming decades will we: discover that we are not alone in the universe? Unravel the physiological basis for consciousness? Routinely have false memories implanted in our minds? Begin to evolve in new directions? And will physicists finally hit upon a universal theory of everything? In fact, if the revelations of the last 50 years are anything to go on - the internet and the human genome for example - we probably have not even thought up the exciting advances that lay ahead of us.

Delve into those visions of the future by author in the story list of this special report, or navigate forecasts by topic here: