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Physics
Astrophysics and Cosmology
Solar System Astronomy
1. Foundations of Solar System Study
2. The Sun: Our Central Star
3. Interplanetary Environment
4. Terrestrial Planets: Inner Solar System
5. Asteroid Belt and Small Bodies
6. Giant Planets: Outer Solar System
7. Trans-Neptunian Region
8. Comets and Small Bodies
9. Solar System Formation and Evolution
10. Comparative Planetology
11. Habitability and Astrobiology
12. Solar System Exploration
13. Planetary Defense
Comets and Small Bodies
Comet Structure and Composition
Nucleus Composition
Dirty Snowball Model
Ice Types
Rocky Material
Organic Compounds
Coma Formation
Sublimation Processes
Gas and Dust Release
Size and Density
Tail Development
Ion Tail Formation
Dust Tail Characteristics
Solar Wind Interaction
Radiation Pressure Effects
Comet Classifications
Orbital Period Groups
Short-Period Comets
Long-Period Comets
Single-Apparition Comets
Dynamical Families
Jupiter Family
Halley-Type Comets
Oort Cloud Comets
Comet Origins
Kuiper Belt Source
Oort Cloud Reservoir
Scattered Disk Contributors
Notable Comets
Halley's Comet
Comet Hale-Bopp
Comet Shoemaker-Levy 9
Comet Exploration
Giotto Mission
Deep Impact Mission
Rosetta Mission
Stardust Mission
Meteoroids and Meteorites
Meteoroid Sources
Cometary Debris
Asteroidal Fragments
Planetary Ejecta
Atmospheric Entry
Meteor Phenomena
Ablation Processes
Fireball Events
Meteorite Types
Stony Meteorites
Chondrites
Achondrites
Iron Meteorites
Stony-Iron Meteorites
Meteorite Analysis
Age Dating
Compositional Studies
Solar System Formation Clues
Meteor Showers
Annual Shower Events
Radiant Points
Parent Body Associations
Observational Techniques
Impact Processes
Crater Formation
Impact Energy
Planetary Surface Modification
Biological Implications
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9. Solar System Formation and Evolution