Unit conversions and collected numbers in cosmology

Abstract

This note collects together useful unit conversions and numerical values from early universe cosmology. It is a quick reference that can be used to make easy order-of-magnitude estimates. Included are tables for unit conversions, the thermal history of the universe, and collected properties of astronomical objects. The note also introduces a modifiable Mathematica package NaturalUnits (newest version 2.0), which makes it easy to convert between natural and physical units.

Comments: 7 pages, 7 tables. Corrected typos, updated for v2.0 of the Mathematica package