Dynamical Aspects for the Earth’s Habitability
Discoveries of more than 560 extrasolar planets show a huge diversity of these planetary systems. Most of the extrasolar planetary systems are quite different to our solar system, only some of them indicate similarities with our system. By now, no other system than ours is known to host a habitable planet like the Earth. Assuming that solar system-like configurations are the most favorable ones where a habitable Earth might exist, we show the influence of the architecture of the planetary system on the habitability. The dynamics in the Solar System is certainly dominated by the two giant planets Jupiter and Saturn. Since it is more likely to find two planets with similar characteristics in a system than a clone of the Jupiter–Saturn pair of our Solar System, we vary the mass ratio of the two planets and their mutual distance. For the different configurations, we study the influence on test bodies (with negligible mass) moving in the habitable zone (HZ). In this chapter, we will discuss the dynamics of various configurations and illustrate some cases which would influence the habitability of the Earth significantly.
KeywordsSolar System Planetary System Semimajor Axis Giant Planet Terrestrial Planet
This work was carried out in the framework of project P19569- N16 supported by the Austrian Science Fund (FWF).
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