====== 4. Planetary Age ======


===== - Birth of the Solar System =====


{{:bn:courses:ast100:planet-formation.webp?nolink|}}



===== - Solar System =====  

{{:bn:courses:ast100:helios.webp?nolink}}


{{:bn:courses:ast100:ss-planets-motion.webp?nolink|}}



{{:bn:courses:ast100:ss-planets-structure.webp?nolink|}}



==== Saturn's Rings ====

{{https://upload.wikimedia.org/wikipedia/commons/thumb/2/2d/Saturn_diagram.svg/1280px-Saturn_diagram.svg.png?nolink}}



===== - Earth =====


{{:bn:courses:ast100:atmosphere-magnetosphere.webp?nolink|}}



{{:bn:courses:ast100:earth.webp?nolink|}}



{{https://upload.wikimedia.org/wikipedia/commons/f/f2/Tectonic_plate_model_1Ga.webm?nolink&800}}



===== - Detecting Planets =====  


{{youtube>TbNGEkAuAjU?large}}  
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{{https://upload.wikimedia.org/wikipedia/commons/4/48/Hr8799_orbit_hd.gif?nolink&500}}



{{:bn:courses:ast100:transits.webp?nolink&650|}}



{{youtube>IiCRZmrgB9g?large}}  
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===== - Classification of Planets =====  



{{:bn:courses:ast100:planets-r-m.webp?nolink|}}



{{:bn:courses:ast100:planets-r-p.webp?nolink&800|}}