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Normal interplanetary travel uses lots of fuel, but taking advantage of some quirks of gravity can let us travel between planets using hardly any fuel at all.

Hosted by: Reid Reimers

Head to https://scishowfinds.com/ for hand selected artifacts of the universe!
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Sources:
http://www.polaris.iastate.edu/EveningStar/Unit6/unit6_sub2.htm
http://www.uphysicsc.com/2013-GM-A-538.PDF [PDF]
https://medium.com/@jbenson/interplanetary-superhighway-8e3e734346ed
https://phys.org/news/2016-11-interplanetary-network.html
http://datagenetics.com/blog/august32016/index.html
https://www.space.com/30302-lagrange-points.html
https://home.aero.polimi.it/topputo/data/uploads/papers/articles/article-2005-2.pdf [PDF]
https://space.stackexchange.com/questions/4050/is-there-a-lot-of-space-trash-at-the-earth-moon-lagrange-points
http://www.gg.caltech.edu/~mwl/publications/papers/lowEnergy.pdf [PDF]
http://www.gg.caltech.edu/~mwl/publications/papers/IPSAndOrigins.pdf [PDF]
http://www2.esm.vt.edu/~sdross/papers/AmericanScientist2006.pdf [PDF]
https://www.nasa.gov/mission_pages/genesis/media/jpl-release-071702.html
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Images:
https://www.istockphoto.com/vector/refuelling-the-rocket-gm476481322-66298475
https://www.istockphoto.com/vector/weight-scale-icon-gm871757126-243522147
https://www.jpl.nasa.gov/edu/teach/activity/lets-go-to-mars-calculating-launch-windows/
https://commons.wikimedia.org/wiki/File:Animation_of_Voyager_2_trajectory.gif
https://commons.wikimedia.org/wiki/File:Lagrangian_points_equipotential.jpg
https://map.gsfc.nasa.gov/media/990529/index.html
https://svs.gsfc.nasa.gov/20245
https://commons.wikimedia.org/wiki/File:Interplanetary_Superhighway.jpg
https://www.istockphoto.com/photo/planets-of-the-solar-system-in-orbit-gm111834966-15579600
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