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The Past, Present and the Futuristic Earth-Moon Orbital-Globe Dynamics - and its habitability
  • Bijay Kumar Sharma
Bijay Kumar Sharma
National Institute of Technology Patna

Corresponding Author:[email protected]

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Abstract

Using Advanced Kinematic Model (AKM), the unfolding of Earth’s eco-system under the influence of the evolving tidally interacting Earth-Moon System (E-M system) is studied. E-M system is born 4.467Gy ago at inner geo-synchronous orbit (aG1 = 15,000Km) which is a Total Energy Maxima Hill Top ( +4.18x10^30J). E-M system tidally evolves to its final interlocking orbit in 97Gy from NOW at outer geo-synchronous orbit (aG2 = 534,590.6Km) which is Total Energy Minima Valley ( - 2.64x10^28J). Tidal evolution is accompanied with synchronization and circularization of Moon’s orbit but co-planarization with Ecliptic plane remains unachievable due to weak tidal coupling between Earth and Moon. E-M system falls in Cassini State 1 in 214My from NOW. In 992.56My from NOW Moon’s ‘orbit’ gets completely circularized and synchronized. In 1.1Gy Sun’s brightness increases 10% and Earth becomes moist green house planet . In 1.3458Gy from NOW Earth Obliquity angle reaches an eco-hostile value of 30.42⁰ with complete destruction of Habitat trinity. In 2Gy from NOW due to Moon’s resonance passage there is large oscillations of obliquity and severe climatic alterations. In 3.5Gy Sun’s brightness increases 40% and Earth becomes a runaway green house planet reducing to a molten remnant. If E-M system survives Red Giant Branch stage, Thermal Pulse-Asymtotic Giant Branch stage, the Planetary Nebular phase and if it survives the present phase of Big-Bang of our Bouncing Universe then in 97Gy from NOW Moon will get interlocked with Earth in a triple synchrony orbital period of 44.7473 d at aG2 = 534,590.6Km.