pn-junction.flv

https://en.wikipedia.org/wik..._and_sun_size_comparison.jpg
https://en.wikipedia.org/wik..._planets_size_comparison.jpg

Inner Solar System
The inner Solar System is the region comprising the terrestrial planets and the asteroid belt.[65] Composed mainly of silicates and metals, the objects of the inner Solar System are relatively close to the Sun; the radius of this entire region is less than the distance between the orbits of Jupiter and Saturn. This region is also within the frost line, which is a little less than 5 AU (about 700 million km) from the Sun.[66]