Paper to appear in Advanced Space Science.
(astro-ph/9809410)
For a PDF version of the article, click
here.
Table of Contents
INTRODUCTION
COSMOLOGICAL DISTANCE AND TIME
GROWTH OF
STRUCTURE IN THE BIG BANG COSMOLOGY
The Cosmic
Microwave Background
Density Inhomogeneities in the Early Universe
Non-Baryonic Dark Matter
PROPERTIES OF PGs
Surface Density
Angular Size
Luminosity
Spectral Energy Distribution
SEARCHES FOR PGs - AN HISTORICAL OVERVIEW
Optical Continuum and Emission-Line Searches
The Era of the Near-Infrared
Masquerading PGs
EVIDENCE FOR
TYPE-DEPENDENT EVOLUTION OF GALAXIES
The Lyman
Dropouts
The Age of Elliptical Galaxies
DUSTY ELLIPTICAL PGs
CONCLUDING REMARKS AND FUTURE PROSPECTS
REFERENCES