Callisto is a moon of the planet Jupiter, discovered in 1610 by Galileo Galilei. It is the third-largest moon in the Solar System and the second largest in the Jovian system, after Ganymede. It does not form part of the orbital resonance that affects three inner Galilean satellites—Io, Europa and Ganymede—and thus does not experience appreciable tidal heating. Callisto rotates synchronously with its orbital period, so the same face is always turned toward Jupiter. Callisto is composed of approximately equal amounts of rock and ices, with a mean density of about 1.83 g/cm3. Compounds detected spectrally on the surface include water ice, carbon dioxide, silicates, and organic compounds. Investigation by the Galileo spacecraft revealed that Callisto may have a small silicate core and possibly a subsurface ocean of liquid water at depths greater than 100 km. Prominent surface features include multi-ring structures, variously shaped impact craters, and chains of craters and associated scarps, ridges and deposits. Callisto is surrounded by an extremely thin atmosphere composed of carbon dioxide and probably molecular oxygen, as well as by a rather intense ionosphere. (more...)
Recently featured: Mendip Hills – Smallville (season 1) – Huntington's disease
Archive – By email – More featured articles...Did you know...
From Wikipedia's newest articles:
- ... that Japanese currency started in the 8th century with the minting of the Wadōkaichin coin?
- ... that the Swabian-Hall Swine breed of pig was started by King William I of Württemberg?
- ... that the production of art in Wales was greatly stimulated by the 18th century fashion for the sublime in landscape painting?
- ... that a reviewer of the 2006 album Gigahearts by the Italian industrial band Dope Stars Inc. described the group as "the new generation of what Goth means in the 21st century"?
- ... that in 1974 animal rights activists attempted to bomb the lab of biologist Mike Handel?
- ... that the original and current Landing Road bridges in Landing, New Jersey, stood side-by-side until the demolition of the older structure?
- ... that King Philip V ordered that any lepers found guilty of poisoning wells in medieval France were to be burnt and their possessions forfeited to the Crown?
- ... that Burgers' Smokehouse is a California, Missouri-based seller of cured and smoked meats including bacon and hickory smoked, salt cured country hams, a specialty of the Ozarks?
- ... that during a rehearsal of Pagliacci with the Florentine Opera in 1998, tenor David Rendall sent a baritone to hospital when his prop knife failed to collapse? Archive – Start a new article –
In the news |
|---|
|
On this day... |
|
March 2: Independence Day in Morocco (1956); The Nineteen Day Fast begins (Bahá'í Faith)
More anniversaries: March 1 – March 2 – March 3 Archive – By email – List of historical anniversaries It is now March 2, 2010 (UTC) – |
|
Other areas of Wikipedia
- Help desk – Ask questions about using Wikipedia.
- Reference desk – Serving as virtual librarians, Wikipedia volunteers tackle your questions on a wide range of subjects.
- Village pump – For discussions about Wikipedia itself, including areas for technical issues and policies.
- Community portal – Bulletin board, projects, resources and activities covering a wide range of Wikipedia areas.
- Site news – Announcements, updates, articles and press releases on Wikipedia and the Wikimedia Foundation.
- Local embassy – For Wikipedia-related communication in languages other than English.
Wikipedia's sister projects
Wikipedia is hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other projects:
| Commons Free media repository | Wikinews Free-content news | Wiktionary Dictionary and thesaurus | |||
| Wikiquote Collection of quotations | Wikibooks Free textbooks and manuals | Wikisource Free-content library | |||
| Wikispecies Directory of species | Wikiversity Free learning materials and activities | Meta-Wiki Wikimedia project coordination |
Wikipedia languages
This Wikipedia is written in English. Started in 2001, it currently contains 3,209,545 articles. Many other Wikipedias are available; some of the largest are listed below.
- More than 500,000 articles: Deutsch · Español · Français · Italiano · Nederlands · 日本語 · Polski · Português · Русский
- More than 150,000 articles: Català · Čeština · Magyar · Norsk (bokmål) · Suomi · Svenska · Українська · 中文
- More than 100,000 articles: العربية · Bahasa Indonesia · Dansk · Esperanto · עברית · 한국어 · Lietuvių · Română · Slovenčina · Српски / Srpski · Tiếng Việt · Türkçe
- More than 40,000 articles: Bahasa Melayu · Български · Eesti · Ελληνικά · English (simple) · Euskara · فارسی · Galego · Hrvatski · Norsk (nynorsk) · Slovenščina · ไทย
|
Rocky Mount Telegram
Due to segregation, he opened the Quigless Clinic Hospital on Tarboro's Main Street in 1946, complete with 26 beds for extended stay and an outpatient ...
705px x 1184px | 84.50kB
[source page]
Main Page Here is the main page of the Tour Operator web interface
unknown
ue, 16 Feb 2010 10:02:08 GM
Try: . ... bpetruzzo on ". Main page. to show only one post" I would like all of my archive and browsing pages... Related posts brought to you by Yet Another Related Posts Plugin. ...
Q. hi, i have an hp pavillion laptop and i got a trojan virus on it, i know how to fix the virus, the problem is, is that my mother restored the computer cause she thought that would fix it, but it didnt and now everytime i try to start the computer it says that there is an error and restarts itself before getting to the main windows page, by the way i have windows vista...please help me!!! thanx
Asked by lemonyowlmail2nd - Sun Oct 7 14:19:14 2007 - - 2 Answers - 0 Comments
A. Restart your computer and start pressing the F8 key on your keyboard. On a computer that is configured for booting to multiple operating systems, you can press the F8 key when the Boot Menu appears. Select an option when the Windows Advanced Options menu appears, and then press ENTER. When the Boot menu appears again, and the words "Safe Mode" appear in blue at the bottom, select the installation that you want to start, and then press ENTE 1. Double-click My Computer, and then right-click the hard disk that you want to check. 2. Click Properties, and then click Tools. 3. Under Error-checking, click Check Now. A dialog box that shows the Check disk options is displayed, 4. Use one of the following procedures: To run Chkdsk in read- [cont.]
Answered by WyattEarp - Sun Oct 7 14:50:49 2007
