Moving Earth

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For construction works that move soil and rock, known as earthmoving, see Earthworks (engineering).

Moving Earth is a theoretical astroengineering concept that involves physically shifting Earth farther away from the Sun to protect the planet's biosphere from rising temperatures. These expected temperature increases derive from long-term impacts of the greenhouse effect combined with the Sun's nuclear fusion process and steadily increasing luminosity. The approach has been acknowledged by some planetary scientists, including some at Cornell University.[1][2][3]

Various mechanisms have been proposed to accomplish the move.[4] The most plausible method involves redirecting asteroids or comets roughly about 100km wide via gravity assists around Earth's orbit and towards Jupiter or Saturn and back. The aim of this redirection would be to gradually move Earth away from the Sun, keeping it within a continuously habitable zone. This scenario has many practical drawbacks: besides the fact that it spans timescales far longer than human history, it would also put life on Earth at risk as the repeated encounters could cause Earth to potentially lose its Moon, severely disrupting Earth's climate and rotation. Additionally, the encounters would require said asteroids or comets to pass close to Earth; a slight miscalculation could cause an impact between the asteroid or comet and Earth, potentially ending most life on the planet, except bacteria.

See also[]

References[]

  1. ^ Korycansky, D.G.; Laughlin, Gregory; Adams, Fred C. (2001). "Astronomical engineering: a strategy for modifying planetary orbits". Astrophysics and Space Science. 275 (4): 349–366. arXiv:astro-ph/0102126. Bibcode:2001Ap&SS.275..349K. doi:10.1023/A:1002790227314. ISSN 0004-640X. S2CID 5550304.
  2. ^ McKie, Robin (June 9, 2001). "Nasa aims to move Earth". The Guardian. Retrieved March 12, 2017.
  3. ^ Ceriotti, Matteo. "Wandering Earth: rocket scientist explains how we could move our planet". The Conversation. Retrieved 2020-11-02.
  4. ^ Hecht, Jeff (October 20, 2008). "Moving the Earth: a planetary survival guide". New Scientist. Retrieved March 12, 2017.

Further readings[]

  • Korycansky, D. G. (2004). "Astroengineering, or how to save the Earth in only one billion years". In Guillermo García-Segura (ed.). Gravitational Collapse: From Massive Stars to Planets : Ensenada, B.C., México, Diciembre 8-12, 2003. UNAM. pp. 117–120. Bibcode:2004RMxAC..22..117K. ISBN 978-970-32-1160-9.
  • McInnes, Colin R. (2002). "Astronomical Engineering Revisited: Planetary Orbit Modification Using Solar Radiation Pressure". Astrophysics and Space Science. 282 (4): 765–772. Bibcode:2002Ap&SS.282..765M. doi:10.1023/A:1021178603836. ISSN 0004-640X. S2CID 118010671.


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