Talk:Io (moon)

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it must be very young. an estimate in years would be nice. 10,000 years old? 100,000? Kingturtle 22:53, 24 Oct 2003 (UTC)

I'd guess that the oldest portions of Io are approximately 10,000 years old. The most volcanically-active regions on the moon change visibly over a course of a couple of months or less.
10K years seems a bit short when concerning the oldest features on the surface of Io. When considering Earth, which is also considered to have a fairly new surface, there is still some exposed area that is on the order of several billion years old. Closer analysis of Io will likely show the age of the oldest surface areas to be on the order of at least millions of years old. These areas may, however, be covered by some amount of dust, which will surely give debators plenty of arguing space when discussing the true age of the surface. -yalbik 06:15, 14 Oct 2004 (UTC)

In fiction/film Outland - which was nicknamed High Moon for its' clear Western genre aspect - was nearly called Io. It was changed to avoid confusion with the comedy 10. -Sparky 23:30, 8 Feb 2004 (UTC)

Contents

[edit] Volcanos and Sulfur Dioxide

The comment: "Unlike volcanoes on Earth, Ionian volcanoes emit sulfur or possibly sulfur dioxide." is odd, because volcanoes on Earth often emit sulfur dioxide. Occasionally they even emit actual sulfur.

I changed it to: "Similarly to volcanoes on Earth, Ionian volcanoes possibly emit sulfur and sulfur dioxide". Miraceti 17:03, 9 Oct 2004 (UTC)
I think the volcanos on Io emit significantly more sulfur and sulfur dioxide than those of Earth, however. In fact, I recall that it wasn't until Galileo that there was evidence that there was any silicate lava being erupted at all. If my recollection is correct, the line should be a lot more strongly worded than that. Bryan 18:15, 9 Oct 2004 (UTC)
I have changed it again :-). This time according to idea written on [1] Miraceti 19:38, 9 Oct 2004 (UTC)
This issue isn't whether Earth or Io emits more sulfur (or Sulfur dioxide) during volcanic eruptions, it is that on Earth, there is far more variety in volcanic gases than is apparent on Io. Volcanic eruptions on earth tend to spew large amounts of water vapor and carbon dioxide, gases absent on Io. not sure where this puts the statement in this article but I hope this helps. Volcanopele 19:55, Jun 24, 2005 (UTC)

[edit] Request for references

Hi, I am working to encourage implementation of the goals of the Wikipedia:Verifiability policy. Part of that is to make sure articles cite their sources. This is particularly important for featured articles, since they are a prominent part of Wikipedia. The Fact and Reference Check Project has more information. Thank you, and please leave me a message when you have added a few references to the article. - Taxman 17:43, Apr 22, 2005 (UTC)

[edit] EO?

On Jeopardy today there was a clue where the answer (question) was "What is IO?" but the guy said "What is EO?" and they accepted it. This made me wonder if there was another pronunciation. I looked around and found this PBS webpage that says the 4 moons are "Eo, Europa, Ganameta, and Callisto". Is Eo an alternate spelling? What's the deal? -- 1 July 2005 06:01 (UTC)

No, but it's an alternate pronunciation. I assume that the Jeopardy answer was spoken, not written? I also notice that the PBS page is a transcript, and transcribers have to write down a lot of stuff they know nothing about; especially with proper names, they often just make a guess at the spelling. Note that 'Ganymede' is also spelled wrong. From the transcription, I'd guess that guy they were interviewing was trying to recreate the Classical Greek pronunciations. (Each of the moons in Wikipedia is listed with its Greek source, if you want to check it out, although a few are missing stress markings.) The Galilean moons would be pronounced [iː.ˈɔː] for Io (Îô), which with an English accent would come out as EE-oh; [ew.ˈrɔː.pɛː] for Europa (Eurôpê); [ga.ny.ˈmɛː.dɛːs] for Ganymede (Ganymêdês); and [kal.li.ˈstɔː] for Callisto (Kallistô). —kwami 2005 July 1 07:11 (UTC)
P.S. A couple months ago, the various moon names were a hodgepodge of pseudo-Greek and naturalized English pronunciations, with no indication of what was what. They should now all have naturalized pronunciations, but for those who wish to pronounce Titan as tee-TAHN, the Greek (or Latin) is there as well.
Oops, I take back part of my comment. The 'Classical' pronunciations are sometimes an attempt to recapture the Latin version of the names, not the original Greek. (They were borrowed by the Romans from the Greeks, and we got 'em from the Romans.) In these cases the stress would be the same as in English: Io would be EE-oh rather than ee-OH, and Titan would be TEE-tahn. kwami

[edit] Ionian vs. Ioan?

Some anon changed all the adj. forms to 'Ioan', claiming this was the form in the technical lit. I've never seen this, but if there is a ref, we could add it as an alternate. kwami 14:06, 22 November 2005 (UTC)

Examples of Ionian (yes, I know this is irregular given the Greek, but we're not speaking Greek):
"The calculated loss cone ranges from ~1.5° to ~2.5° over one Ionian revolution around Jupiter."
— Electron Beams and Ion Composition Measured at Io and in Its Torus, Science 18 October 1996
"The UV emissions from the torus will reveal the nature of the Ionian material and Jupiter's energy output."
—STS-95 Payload: International Extreme Ultraviolet Hitchhiker (IEH-3) (NASA)
"PIA00709: Massive Resurfacing of the Ionian Volcano Ra Patera"
—Title of NASA photo release.
"These lava lakes could be an Ionian version of mid-ocean ridges"
—quote from Tracy Gregg, assistant professor of geology at State University of New York, Buffalo
Etc. kwami 18:00, 22 November 2005 (UTC)

[edit] Translations upcoming

I added the first big section of information I translated from the Portuguese wiki- more is coming later.--Adam (talk) 03:50, 24 January 2006 (UTC)

Sorry, I forgot to add that I have translated all the information that was available from the Portuguese version.--Adam (talk) 11:41, 8 April 2006 (UTC)
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