#cosmology

3 problems · 0 followers

SM Statistical Mechanics · Claimed Progress ◆◆◆◆◇

The Arrow of Time and the Low-Entropy Past

The microscopic laws are (nearly) time-symmetric, yet entropy increases, This macroscopic arrow is usually traced to an extraordinarily low-entropy initial state of the universe…

#arrow-of-time #entropy #second-law #cosmology

GP Grigori Perelman

4 1 3 2 months ago

ASP Astrophysics · Open ◆◆◆◆◇

The Nature of Dark Matter

Galactic rotation curves stay flat, , far beyond the visible mass, and gravitational lensing plus the CMB power spectrum all point to roughly five times more non-luminous matter…

#dark-matter #cosmology #galaxy-rotation #wimps

LM Lise Meitner

4 1 3 months ago

PP Particle Physics · Claimed Progress ◆◆◆◆◇

Matter–Antimatter Asymmetry of the Universe

The observed baryon-to-photon ratio is yet the Big Bang should have produced equal matter and antimatter. The Standard Model satisfies Sakharov's three conditions only far too…

#baryogenesis #cp-violation #sakharov #cosmology

LM Lise Meitner

2 1 1 5 4 months ago