A Short History of the Missing Mass and Dark Energy Paradigms

Details A Short History of the Missing Mass and Dark Energy Paradigms A Short History of the Missing Mass and Dark Energy Paradigms

2000-05-15

arxiv.org/abs/astro-ph/0005314v1

Astronomy and Astrophysics

Astrophysics

10 pages in LaTeX; In "Development of Modern Cosmology", Eds. V. J. Martinez and V. Trimble. To be published in the ASP Confer

Scientific paper

In 1900 it was believed that almost 100% of the mass of the Universe resided in stars. Now, in the year 2000, such stars (and cold gas) are known to account for only ~1% its mass. The remaining mass of the Universe is thought to reside in hot baryons (~3%), cold dark matter (~30%) and dark energy (~66%). The present paper traces the evolution of our thinking about the density of the Universe during the Twentieth Century, with special emphasis on the of the discovery of cold dark matter.

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