Astronomy [Book]

The Astronomy [Book] is a complete guide to astronomy at a university level.

1. Introduction
   • Introduction to the Universe
   • A Tour of the Universe [beta]
   • The Scale of the Universe [beta]
   • The Universe on the Large Scale [beta]
   • The Universe of the Very Small [beta]
   • The Universe as a Power Generator [beta]
   • Life Story of the Universe [beta]
   • A Conclusion and a Beginning [beta]
2. Chapter II — The Birth of Astronomy
   • Observing the Stars — The Birth of Astronomy [beta]
   • Understanding The Sky Above [beta]
   • Ancient Astronomy [beta]
   • How do we know the Earth is round? [Astronomy Basics] [beta]
   • The Relationship Between Astronomy and Astrology [beta]
   • The Birth of Modern Astronomy [beta]
   • The Birth of Astronomy — Problem Set [beta]
3. Chapter III — Orbits and Gravity
   • Chapter III — Orbits and Gravity [beta]
4. Light
   • The Electromagnetic Spectrum
   • The Discovery of the Electromagnetic Spectrum
   • The Visible Spectrum
   • William Herchel’s Discovery of Infrared Light
   • Spectroscopy
   • Anders Jonas Angstrom
   • The Angstrom Unit of Physics and Chemistry
5. Gravity
   • The Difference Between Mass and Weight
   • Weight On Other Worlds
   • Your Weight on the Moon
   • Your Weight on Mars
   • Earth Mass (M_🜨) [5.972 x 10²⁴ kg]
   • The Radius of the Earth [6378 km]
6. The Solar System
   • The Solar System
   • Heliopause :: Where The Sun Ends And Interstellar Space Begins
   • The Diameter of the Solar System
7. Stars
   • Star Brightness
   • The Messier Catalogue
8. Galaxies
   • Galaxy
   • What Is A Galaxy?
   • The Four Main Types of Galaxy
9. Black Holes
   • Black Hole Accretion Disc
10. Astronomical Instruments
    • Telescopes
    • Optical Telescopes
11. Appendix
    • Astronomy Basics
      • How do we know the Earth is round? [beta]
12. Appendix II — Cosmic Objects, Constellations
    • Constellations
      • Aquila Constellation
    • Galaxies
      • HD1 (galaxy)
      • Holmberg 15A <Holmberg 15A>
    • Neutron Stars (Pulsars)
      • Hulse-Taylor Binary [PSR B1913+16]
      • PSR J0348+0432 [Neutron Star:Pulsar]
    • Black Holes
      • Super-Massive Black Hole’s (SMBH’s)
        • Holmberg 15A*
      • Black Hole Accretion Disk

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