Table of contents : 1.1.1 9 10 11 2 The Atmosphere: Connections with the Earth’s Mass and Distance from the Sun 3 Thermal Habitability: Connection with the Earth’s Motion Around the Sun 4 Overall Habitability: Connections with Geological and Astronomical Events and Processes 5 Liquid Water: Connections with the Outer Reaches of the Solar System 6 The Building Blocks of Organisms: Connections with Gravitation 7 The Natural Greenhouse Effect: Connections with Geological Activity 8 The Long-Term Atmosphere: Connections with the Earth’s Magnetic Field Index 1 2 1.4.1 1.2.2 2012 1.1.3 1.2 1.3 1.4 1.5 1.6 1.1 1.5.1 1.5.4 1.3.4 1.3.2 2018 2008 2017 2016 2019 1.3.1 1.3.5 1995 1.7 2013 1.8 1.9 1.3.6 1.10 2014 1.4.2 1.3.3 1.5.2 1.11 2.2 2.3 2.4