21st Century Astronomy, Second Edition
Animations
- The Celestial Sphere and the Ecliptic
- The Earth Spins and Revolves
- The Moon's Orbit: Eclipses and Phases
- Kepler's Laws
- Newton's Laws and Universal Gravitation
- Light as a Wave, Light as a Photon
- The Doppler Effect
- Atomic Energy Levels and the Bohr Model
- Atomic Energy Levels and Light Emission and Absorption
- Geometric Optics and Lenses
- Solar System Formation
- Processes That Shape the Planets
- Tides and the Moon
- Solar Spectrum
- H-R Diagram
- The Solar Core
- Star Formation
- Hubble's Law
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