Astronomical Engineering: A Strategy For Modifying Planetary Orbits

  title={Astronomical Engineering: A Strategy For Modifying Planetary Orbits},
  author={D G Korycansky and Gregory P. Laughlin and Fred C. Adams},
  journal={Astrophysics and Space Science},
The Sun's gradual brightening will seriously compromise the Earth'sbiosphere within ∼ 109 years. If Earth's orbit migrates outward,however, the biosphere could remain intact over the entiremain-sequence lifetime of the Sun. In this paper, we explore thefeasibility of engineering such a migration over a long timeperiod. The basic mechanism uses gravitational assists to (in effect)transfer orbital energy from Jupiter to the Earth, and therebyenlarges the orbital radius of Earth. This transfer is… 
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The collision with Earth of near-Earth asteroids or comet nuclei poses a potential threat to mankind. Objects about 100 m in diameter could be diverted from an Earth-crossing trajectory by the impact
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Self-consistent evolutionary models were computed for our Sun, using Los Alamos interior opacities and Sharp molecular opacities, starting with contraction on the Hayashi track, and fitting the
An introduction to the mathematics and methods of astrodynamics
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J. Spacecraft & Rockets
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