 |
| Previous Image | Next Image |
| Description: Nebular theory Explains formation of solar system Sun and planets formed from solar nebula Rotating cloud of gas and dust Solar nebula contracted and formed hot protosun Planetesimals formed Planetesimals became protoplanets Terrestrial (Earth-like) planets Mercury, Venus, Earth, and Mars Small, dense, rocky Large cores of iron and nickel Low escape velocities Jovian (Jupiter-like) planets Jupiter, Saturn, Uranus, and Neptune Large, low density, gaseous Massive Thick atmospheres composed of hydrogen, helium, methane, and ammonia High escape velocities Picture Stats: Views: 501 Filesize: 834.19kB Height: 872 Width: 915 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=39865 |