Basics
| Apparent Motions of the Sun and Stars |
| Calendars |
| Conjunction and Opposition |
| Ecliptic |
| Equinoxes and Solstices |
| Motions of the Planets |
| Precession and Nutation |
| Solar System |
| Zodiac |
Early European Astronomy
| Greek |
| Geocentric Universe |
| Rome |
| Western Europe |
Ancient and Distant Lands
| China |
| Calendars |
| Observation Instruments |
| Star Lists and Charts |
| Egypt |
| India |
| Islam |
| Introduction |
| Doubts about Ptolemy |
| Observatories |
| Mesoamerica |
| Mesopotamia |
Medieval European Astronomy (5th-13th Century)
Renaissance (14th-15th Century)
| Galileo Galilei (1564-1642) |
| Johannes Kepler (1571-1630) |
| Nicolaus Copernicus (1473-1543) |
| Regiomontanus (1436-1476) |
| Tycho Brahe (1546-1601) |
Modern Era (16th Century-Present)
| 16th Century |
| Cepheids |
| 17th Century |
| Distances to the Stars |
| Halley’s Comet |
| Inverse Square Law |
| Longitude |
| Parallax |
| 18th Century |
| Annual Parallax |
| Black Holes |
| Bode’s Law |
| Milky Way |
| Nebulae and the Galaxy |
| Proper Motion |
| 19th Century |
| Doppler Effect |
| Magnitude |
| Relativity |
| Spectroscopy |
| Sunspots |
| 20th Century |
| Big Bang Theory |
| Expanding Universe |
| Hertzsprung-Russell Diagram |
| Radio Astronomy |
Appendices (A)
| Astronomy: Chronology |
| Observatories: Alphabetical List |
| People: Alphabetical List (Astronomy) |
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