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Posts Tagged ‘Sean Carroll

Why is the Universe Accelerating?

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sean_carrolSEAN M. CARROLL
The universe appears to be accelerating, but the reason why is a complete mystery.
The simplest explanation, a small vacuum energy (cosmological constant), raises three difficult issues: why the vacuum energy is so small, why it is not quite zero, and why it is comparable to the matter density today.
I discuss these mysteries, some of their possible resolutions, and some issues confronting future observations….
… Read more at http://www.astro.caltech.edu/~george/ay21/readings/carroll.pdf

Written by physicsgg

July 8, 2013 at 9:14 am

Posted in COSMOLOGY, DARK ENERGY

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Sean Carroll: The Arrow of Time feat

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MinutePhysics

Why is the past different from the future? Caltech physicist Sean Carroll explains how the arrow of time is not an intrinsic property of physics, but rather an emergent feature.

http://youtu.be/GdTMuivYF30

Written by physicsgg

November 14, 2011 at 1:31 pm

Lectures on Cosmology and Particle Physics

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by Sean Carroll

Lecture One: Introduction to Cosmology

http://youtu.be/vUNtO2r_-eo

Lecture Two: Dark Matter

http://youtu.be/Gq-lGX2PRrc

Lecture Three: Dark Energy

http://youtu.be/cYVj2RhXxeU

Lecture Four: Thermodynamics and the Early Universe

http://youtu.be/178mMnGvWs0

Lecture Five: Inflation and Beyond

http://youtu.be/M1PeXaMqKto

Written by physicsgg

October 20, 2011 at 4:39 pm

Posted in COSMOLOGY, DARK ENERGY, DARK MATTER

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