Introduction to Physics
P1 Solar System Orbit
P2 Orbit outside the solar system
P3 Special Relativity
P4 particles and forces
P5 star
P6 Copy Process
P7 Cosmology

Part 1: The Solar System
Chapter 1: Celestial Dynamics and the Solar System
Chapter 2: Overview of the Solar System
Chapter 3: The Movement of the Earth
Chapter 4 Earth and the Moon
Chapter 5: Terrestrial Planets: Mercury, Venus, and Mars
Chapter 6: Jovian Planets and Pluto
Chapter 7: Small Celestial Bodies and the Origin of the Solar System

Part 2 Star
Chapter 8 Electromagnetic Radiation and Matter
Chapter 9 Telescopes and Detectors
Chapter 10: The Sun: The Standard Star
Chapter 11 Stars: Distance and Magnitude
Chapter 12: Stars: Binary Star Systems
Chapter 13: Classification of Spectra and Hertzsprung-Russell Diagram

Part 3: The Milky Way
Chapter 14 Our Galaxy: An Overview
Chapter 15: Interstellar Matter and the Birth of Stars
Chapter 16: Stellar Evolution
Chapter 17: The Death of a Star
Chapter 18 Variable Stars and Explosive Stars
Chapter 19: Galactic Rotation: Stellar Motion
Chapter 20: The Evolution of Our Galaxy

Part 4: Space
Chapter 21: Galaxies Beyond the Milky Way
Chapter 22: Hubble's Law and the Distance Scale
Chapter 23: The Grand Structure of the Universe
Chapter 24: Active Galaxies and Quasars
Chapter 25 Cosmology: The Big Bang and Beyond
Chapter 26: A New Cosmology

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