Les planètes ne sont pas que des grosses sphères de roche, de glace ou de gaz. Leur zone d'influence se prolonge bien au-delà de leur haute atmosphère, à travers leur attraction gravifique et leur champ magnétique.
When an atom or a molecule collides with another particle, it can gain internal energy which will be lost by the emission of light.
The terrestrial planets possess several common characteristics (e.g. their mass, diameter, density or their distance to the sun), but they also differ in many respects.
Biogeochemical cycles play an important role in the evolution of Earth's climate. This especially holds for the carbon cycle.
