Talk:Interplanetary Transport Network

message: The mention of the Belbruno paper mentioning the four-body problem from invariant manifolds is a broken reference and a broken link as well.  Does anyone have a copy of this hiding somewhere that they can either reference or upload so they can reference it?  Thanks and regards.  -- User:Digemedi 19:19, 31.30.2009  —Preceding undated comment added 02:20, 1 April 2009 (UTC)
thread_title:  External Links 

message: Is this the correct spelling?  Is it really "superhiway" instead of "superhighway"?  I find no Google hits with this spelling.  -- Zoe
:I looked in the article quoted, and they used "superhighway," so I moved it. - Montréalais
* POSSIBLE COPYVIO From http://www.nsf.gov/news/news_summ.jsp?cntn_id=104423&org=olpa&from=news, the text is identical to that of "Mathematics Unites The Heavens And The Atom" Space Daily, 28 Sep 2005
**Publications of United States Government agencies are in the public domain.  Kurt Weber 19:51, 8 January 2006 (UTC)
thread_title:  Spelling 

message: How exactly does chaos theory predict these orbit transfers?  That line assuming it is not total nonsense shoudl be explained and cited. Dalf | Talk 06:20, 4 August 2006 (UTC)
replies: text: The established chaotic nature of n-body gravitational systems suggests the possibility that extremely high-gain amplification of relatively small input perturbations may occur and even be of practical use (for what I admit, is not obvious).  Thus a small impulse artificially given to one body might yield a larger gravitational impulse by a controlled close-encounter with another larger body, and so on.  Then a cascade of exponentially growing operations could allow the manipulation of large effects, perhaps in a interestingly short time.  A systematic search for orbital 'keyholes' (of the kind familiar from NEA hazard projections, but extended to other pairs of bodies, not just those with Earth) might reveal interesting possibilities for the future.  Comet Shoemaker-Levy 9's encounter with Jupiter and (on a larger scale) 2060 Chiron's occasional close encounters with Saturn, come to mind.  If a large enough number of such keyholes could be found among smaller bodies, one would expect a characteristic exponential growth time scale, tau,  to emerge, which could perhaps also be estimated theoretically.  I wonder if any studies or computational searches have been done along these lines?  Wwheaton (talk) 01:42, 12 June 2008 (UTC)
thread_title:  Chaos theory? 

message: There are a great number of external links that seem to not be particularly centered on the topic at hand, in particular links to all of the talks by Shane Ross at Caltech. I do not know this topic well, but as a naive reader, it seems that perhaps one or two articles from a given author would be appropriate, but that author's entire on-line publishing and speaking history would be better placed in an article about the person. That said, I've pared down the external links section greatly, but would appreciate discussion here if anyone feels that this is in error. --Zippy 23:15, 8 January 2007 (UTC)
thread_title:  External links - paring down 

message: It would be useful to show a scientific diagram of how this works, perhaps with a specific example trajectory. -- Beland (talk) 05:24, 21 January 2008 (UTC)
thread_title:  Diagram 

message: I am proposing merging Low energy transfers into Interplanetary Transport Network. They have mostly duplicate content. Low energy transfers might fit better as a section inside Interplanetary Transport Network. If anything, Interplanetary Transport Network covers more on the topic of Low Energy Transfers than Low energy transfers does. Allanlw 04:48, 31 December 2008 (UTC)
thread_title:  Merger Proposal 

message: "The key to the Interplanetary Transport Network was investigating the exact nature of these winding paths near the rectal points. They were first investigated by Jimmy Hendrix in the 1890s." Obviously the reference to Jimmy Hendrix is vandalism, so I have removed it, but I have no idea whose name should actually be there. 24.171.21.228 (talk) 16:13, 21 June 2010 (UTC)
replies: text: If you'd checked the edit history you would have easily found your answer. tildetildetildetilde  —Preceding unsigned comment added by 75.164.84.100 (talk) 22:59, 24 June 2010 (UTC)
thread_title:  What? 

message: Why is a search for the article title "InterPlanetary Network" redirected here, when there is a distinct article with that title?Michael9422 (talk) 19:45, 20 April 2013 (UTC)
thread_title:  redirect from InterPlanetary Network 

message: I accept, but would not know for sure, that the lede as it stands is a correct and succint summary of the topic. Nevertheless, it does at first glance read like a description of some kind of actual transport system; ie, that it is man-made and indeed possibly in use. And the diagram reinforces the concept.  — Preceding unsigned comment added by 58.166.118.138 (talk) 09:55, 19 July 2014 (UTC)
replies: text: Concur. In truth the entire article reads that way, i.e. that it is or would be "possible" to use these trajectories for meaningful interplanetary travel. The time scales make it unlikely they would be used for this purpose, for either a crewed or robotic mission. How to best add source references that explain that is unclear.... (sdsds - talk) 19:58, 12 June 2015 (UTC)
replies: text: They have already been used for travel; a probe went out to the solar L1 point and then returned using virtually no propellant. I think a communications satellite also reached geosynchronous orbit using a combination of these techniques and an ion drive.GliderMaven (talk) 20:31, 12 June 2015 (UTC)
replies: text: I am skeptical WSBs as described by Lo, Marsden and others were used to achieve geosynchronous orbit. Also use of an ion drive is often conflated with use of WSBs.HopDavid (talk) 17:42, 6 January 2016 (UTC)

text: Yes, but those aren't examples of interplanetary travel, are they? Wouldn't that be how the "Interplanetary Transport Network" would be used? (sdsds - talk) 07:47, 9 September 2015 (UTC)
replies: text: Well, it is what it is, and you can use it in different ways. Note that it's a transport network, not specifically a transportation network. Many of the things that travel along it would be asteroids and similar that just happen to pass close to a Lagrange point.GliderMaven (talk) 13:12, 9 September 2015 (UTC)
thread_title:  Lede is a little misleading. 

message: The stylised depiction shows ITN extending from Venus, Earth, Mars, to Jupiter, Saturn, Uranus etc. Ross-2006 says the tubes from the various L1 and L2 points around different bodies only intersect occasionally. Is this network actually a network of gentle gravitational assists ? If not, where does the energy and momentum come from to get from orbiting earth to orbiting say Jupiter ? Rod57 (talk) 11:03, 26 July 2020 (UTC)
replies: text: Comments by others (eg HopDavid) above say the weak stability boundaries (WSB's or 'tubes'?) do not extend from Earth to Mars or Jupiter, contradicting the diagram and some text in this article and the Ross-2006 source. Do they (ever) or can't they ? - Rod57 (talk) 11:13, 26 July 2020 (UTC)
thread_title:  Extent of ITN and mechanism