Editing Tom Van Flandern (section)

=== Le Sage's theory of gravitation and the speed of gravity ===
Van Flandern supported [[Georges-Louis Le Sage]]'s [[Le Sage's theory of gravitation|theory of gravitation]], according to which gravity is the result of a flux of invisible "ultra-mundane corpuscles" impinging on all objects from all directions at superluminal speeds. He gave public lectures in which he claimed that these particles could be used as a limitless source of free energy and to provide superluminal propulsion for spacecraft.<ref>{{Cite journal| author = Jeffery D. Kooistra |title = Conference on Future Energy |journal=[[Magazine (magazine)|Magazine]] |issue= 26 | date = July–August 1999}} An editor gave a summary of Van Flandern's talk at the Infinite Energy conference and wrote "Van Flandern gave a talk entitled 'On a Complete Theory of Gravity and Free Energy'. For the free energy enthusiast, the implications of gravity being particulate and perhaps blockable are obvious. Block or deflect the c-gravitons raining down from the sky and up you go into space. Turn off the blocking shield and recover the energy you've gained, for free, as you fall back to Earth."</ref><ref>{{Cite web |url=https://www.youtube.com/watch?v=51aJobWkrig | archive-url=https://web.archive.org/web/20140131201005/http://www.youtube.com/watch?v=51aJobWkrig| archive-date=2014-01-31 | url-status=dead|title = Dr. Thomas Van Flandern – MUFON-LA (1 of 1) | publisher = youtube}}</ref>

In 1998 Van Flandern wrote a paper<ref>{{Cite journal| doi = 10.1016/S0375-9601(98)00650-1 | title = The speed of gravity ? What the experiments say | date = 1998 | last1 = Van Flandern | first1 = T | journal = [[Physics Letters A]] | volume = 250| issue = 1–3 | pages = 1–11|bibcode = 1998PhLA..250....1V }}</ref> asserting that astronomical observations imply that gravity propagates at least twenty billion times faster than light, or even infinitely fast. [[Gerald E. Marsh]], Charles Nissim-Sabat and [[Steve Carlip]] demonstrated that Van Flandern's argument was fallacious.<ref>{{Cite journal| doi =10.1016/S0375-9601(99)00675-1 | title =Comment on "The speed of gravity" | date =1999 | last1 =Marsh | first1 =Gerald E | last2 =Nissim-Sabat | first2 =Charles | journal =Physics Letters A | volume =262| issue =2–3 | pages =257|bibcode = 1999PhLA..262..257M | url =https://zenodo.org/record/1260033 }}</ref><ref>{{Cite journal| last1 =Carlip | first1 =S | title=Aberration and the Speed of Gravity | journal= Phys. Lett. A | date=2000 | volume=267| issue =2–3 | pages=81–87 | arxiv= gr-qc/9909087 | doi=10.1016/S0375-9601(00)00101-8 |bibcode = 2000PhLA..267...81C | s2cid =12941280 }}</ref>