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Are there NO Wikipedia articles without internal inconsistencies??? First 'canali' are stated to be MISTRANSLATED as 'canals', and later on they are said to mean inter alia 'channels or canals', in which case 'canals' is NOT a mistranslation. Come on, seriously ...
I always understood that the Italian word "canali" was misinterpreted as canals. Canali could mean canal (as in manmade river) or just channel (witch could be naturally formed). Schiaparelli meant the lather, I thought. Perhaps something to look up...
- Het_genie
It seems someone has added some text about martian RSL https://en.wikipedia.org/wiki/Seasonal_flows_on_warm_Martian_slopes which are a completely different phenomenom, and completely invisible from Earth. I don't think RSL are relevant to this subject, and I will be deleting the references to them in this article in a few days if no one objects. — Preceding unsigned comment added by 84.74.121.6 (talk) 17:04, 11 June 2016 (UTC)
This article repeatedly mentions "opposition" (E.G. the "opposition of 1874"). Please explain what this is supposed to mean in this context on first use, because it is quite unclear at present.
--IRelayer 17:01, 17 April 2006 (UTC)
Very briefly, it means that the planet is on the opposite point from the Sun in the sky, which means it's both at its closest distance to Earth and visible most clearly to earthbound observers. But surely the link to opposition (astronomy) should be enough to fill in those not familiar with the term? Orcoteuthis (talk) 11:16, 19 January 2008 (UTC)
It would helpful if someone would describe the nature of this "optical illusion" that causes people to see non-existant canals. Drutt 12:38, 11 March 2007 (UTC)
I've done little editing, so I'm reluctant to make this change.
The article has
'Some observers saw a phenomenon they called "germination", or doubling — two parallel canals.'
I was just reading Scientific American's reprint of their review of a Percival Lowell book: http://www.sciam.com/article.cfm?chanID=sa026&articleID=1C26A61F-E7F2-99DF-3A3A10BD449164B9&pageNumber=2&catID=4 It includes
'It appears that in some cases certainly, and possibly in all, the dual aspect is not a temporary condition, but a permanent state marked with varying intensity, the fact of "gemination," so called, being confined to a filling out of what is always there in skeleton. '
"Germinate" is from Latin "germen", meaning 'seed' (http://www.bartleby.com/61/45/G0104500.html). "Geminate", "1. To double. 2. To arrange in pairs" is from Latin "geminus", meaning 'twin' (http://www.bartleby.com/61/39/G0073900.html). E.g., Gemini, the constellation of the Twins. "Geminate" is obviously far more appropriate for a phenomenon of doubling in particular.
I could change "germinate" to "geminate", but I don't know how to cite the Scientific American article in a Wikipedia article.
-- Tim McDaniel, tmcd@panix.com (don't have my Wikipedia login info with me)
Modern science recognizes one very prominent linear feature on Mars, Valles Marineris. If any of the canal observations were rooted in reality, then maps of the canals should match up with at least this one feature. Since maps were drawn at a known date and time, the real and imagined maps should actually be possible to compare directly, with precise latitudes and longitudes, if someone has the skill and patience to work out the astronomy. Is anyone up to the challenge? Thanks! 70.15.116.59 03:16, 7 October 2007 (UTC)
Many of the largest geographic features on Mars are entirely unremarkable in telescopic views with the eye. Remember that images, such as the one you posted, are produced with substantial contrast enhancement of images taken through appropriate filters. While your idea definitely has merit, I don't suspect any observer (in the past or present) would remark on Valles Marineris, Olympus Mons, or any of the other giant canyon or volcanoes of Mars. For example, see http://mpfwww.jpl.nasa.gov/MPF/mpf/marswatch/marsnom.html for albedo markings recorded by eye and by digital camera. "Olympus Mons" (marked by its old name "Nix Olympica") and Valles Marineris are practically invisible since the whole Tharsis region is covered in deep, uniformly bright dust.140.198.64.198 (talk) 20:40, 27 February 2009 (UTC)
I believe that he and others, escpecially the others, using their eyes and equipment at the limit of their power, simply experienced a case of wishful thinking delusion. However, it may be that Schiaparelli and some others actually saw a faint reflection of their own capillaries in their own eyes which are organized in a way that resembles the canal drawings. This is something that actually has happened to me when I use certain makes of binoculars. Unfortunately, I do not know of a name of the phenomenon. —Preceding unsigned comment added by 193.234.174.228 (talk) 12:28, 18 March 2008 (UTC)
Sky and Telescope carried such an article:
http://www.skyandtelescope.com/news/3306251.html?page=1&c=y —Preceding unsigned comment added by 65.71.68.43 (talk) 23:03, 27 March 2009 (UTC)
They are called Purkinje images , but even through a huge telescope (I've looked at it with an 18-inch diameter scope at a good opposition), Mars is not bright enough to cause this. — Preceding unsigned comment added by 121.218.220.219 (talk) 09:30, 20 January 2016 (UTC)
I discovered on the internet that the reason for the illusion of the canals was that the telescope Giovanni was using had a flaw in it causing the illusions of canals. Wizard 109109 (talk) 14:17, 11 April 2008 (UTC)
Can you give the link to the page you found that information on, please? I could use that for an essay I'm writing. If you don't know the url, can you maybe just tell me the search engine and the search terms you used? Thanks! Sudosane (talk) 22:02, 10 February 2009 (UTC)
Many researchers still support the idea that there are canals on Mars. Although this view is not accepted by mainstream science, their views should be shown and documented along with the historical debate. —Preceding unsigned comment added by 166.128.222.199 (talk) 00:35, 10 May 2008 (UTC)
Please provide more information. Are they actually researchers or amateur astronomers? —Preceding unsigned comment added by 74.70.9.105 (talk) 16:59, 2 June 2008 (UTC)
In the 1911 Britannica article on Mars Percival Lowell is quoted as saying his photographs of Mars show the canals quite clearly. Did these photos ever exist? Any chance of locating them to see what he saw? Or did he just claim photos had been taken? —Preceding unsigned comment added by 65.71.68.43 (talk) 22:57, 27 March 2009 (UTC)
how do I go about doing that so it doesn’t get removed? — Preceding unsigned comment added by 31.54.219.113 (talk) 02:16, 29 January 2014 (UTC)
Schiaparelli's book La Vita Sul Pianeta Marte (Life on the Planet Mars), published in 1893 argues for a natural geological origin of the channels and compares them to the English Channel. He says "The network formed by the channels was probably shaped by the geologic state of the planet and it is slowly developing over the centuries. There is no need to suppose the work of intelligent beings; and despite the quasi-geometric appearance of the system, we are for now inclined to believe they are products of the evolution of the planet, just as on Earth, the English Channel and the Mozambique Channel." This is my translation from http://www.gutenberg.org/cache/epub/7781/pg7781.html which lacks pagination but you can search "Non occorre suppor qui l'opera di esseri intelligenti." Colin McLarty (talk) 02:07, 1 February 2015 (UTC)
1. Ever since Mars has been observed by telescopes, observers have noted the intermittent massive dust storms that often cover half the planet. In the scientic environment of the 18th and 19th century, dust storms would have "intuitively" - if ultimately incorrectly - greatly supported the concept of an active, and thus significant, atmosphere. After all, if the dust goes to (pick a figure) 100km high, then it follows that the atmosphere must be at least that high, too.
2. A white pole cap, against a pinkish planetary image, would through now well-known optical illusion mechanisms have created the impression of a green border in between. This border looks very "real", and even if you understand colour theory and what it is doing in your eye/brain right there, you cannot convince yourself that it isn't really there. The "conclusion" is absolutely inescapable: the polar caps are melting, creating liquid water, which is flowing into the desert at the desert/pole_cap boundary and causing, or at least encouraging, plants to grow there.
AT THE TIME, both of these would have lent very credible support to a notion of an inhabitable - or even inhabited - planet.
3. There is one more aspect to the "controversy". It is almost certainly absurd, but in an article such as this it is surely worth mentioning. The alleged canals started disappearing at about the same time as extensive gas lighting started to appear in the major cities on Earth. The "conspiracy theory" has it that this was no coincidence. That the alleged Martians would have seen this (bright points of light on the dark - non-sunlit - portions of Earth) through their telescopes, correctly deduced that it was caused by so-called intelligent life of Earth, became afraid that their existence might be detected, and went to great lengths to hide - dismantling their canals and "cities", with the theory further suggesting that they moved them underground. — Preceding unsigned comment added by 121.218.220.219 (talk) 09:42, 20 January 2016 (UTC)
"so-called intelligent life of Earth" is an absurd comment. Human life is intelligent by the definition of the term.
The article is about the concept of the canals on Mars, not about a specific canal. Shouldn't its title be plural? — Preceding unsigned comment added by Keavon (talk • contribs) 02:23, 11 February 2018 (UTC)
https://www.space.com/mars-big-rivers-billions-years.html Physicsjock (talk) 02:25, 28 March 2019 (UTC)
Martian canals have been photographed (very rarely) and digitally imaged much more frequently. As far as i know this has only been done from the surface of the earth. I was surprised there was nothing on Wikipedia about this, but then more surprised that i can't find it anywhere on the net either. The phenomenon is not merely a psychological aberation (though that may be a factor in some of the more elaborate old maps). Exactly what is going on is hard to understand. Martian style canals are not observed on other planets, such as Jupiter, so not just an problem with the instruments. On the other hand, close ups from space probes strongly suggest the canals don't exist. Has anyone seen any sources on the net, or in print, outlining the evidence in a sane way? 110.145.170.78 (talk) 05:23, 12 June 2020 (UTC)
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