Cassini

Sidera Lodoicea (IPA ˈsɪdərə ˌlɒdəʊˈɪʃə) is the name given by the astronomer Giovanni Domenico Cassini to the four moons of Saturn discovered by him in the years 1671, 1672, and 1684 and published in the Journal des sçavans in 1673 and 1686. These satellites are today known by the following names (given in 1847): This image has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. ... This image has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. ... Symbols of the International Phonetic Alphabet as used for English. ... Giovanni Domenico (Jean-Dominique) Cassini Portrait Giovanni Domenico Cassini (June 8, 1625 - September 14, 1712) was an Italian astronomer and engineer. ... Saturn Rings and Satellites. ...

• Iapetus or Saturn VIII, discovered October 25, 1671
• Rhea or Saturn V, discovered December 23, 1672
• Tethys or Saturn III, discovered March 21, 1684
• Dione or Saturn IV, discovered March 21, 1684

Iapetus

Rhea

Tethys

Dione

The name Sidera Lodoicea means "Louisian Stars", from Latin sidus "star" and Lodoiceus, a nonce adjective coined from Lodoicus, one of several Latin forms of the French name Louis (reflecting an older form, Lodhuwig). Cassini intended the name to honor King Louis XIV of France, who reigned from 1643 to 1715, and who was Cassini's benefactor as patron of the Paris Observatory, of which Cassini was the director. Iapetus (eye-ap-É™-tÉ™s, IPA , Greek Ιαπετός) is the third-largest moon of Saturn, discovered by Giovanni Domenico Cassini in 1671. ... Atmosphere none Rhea (ree-a, Greek ‘Ρέα) is the second largest moon of Saturn and was discovered in 1672 by Giovanni Domenico Cassini. ... Atmosphere none Tethys (tee-thÉ™s or teth-É™s, IPA , Greek Τηθύς) is a moon of Saturn that was discovered by Giovanni Domenico Cassini in 1684. ... Atmosphere none Dione (dye-oe-nee, Greek Διώνη) is a moon of Saturn discovered by Giovanni Cassini in 1684. ... Wikipedia does not have an article with this exact name. ... Wikipedia does not have an article with this exact name. ... Iapetus (eye-ap-É™-tÉ™s, IPA , Greek Ιαπετός) is the third-largest moon of Saturn, discovered by Giovanni Domenico Cassini in 1671. ... Atmosphere none Rhea (ree-a, Greek ‘Ρέα) is the second largest moon of Saturn and was discovered in 1672 by Giovanni Domenico Cassini. ... Image File history File links Download high resolution version (1000x1000, 67 KB) Thethys (satellite of Saturn) imaged by the Cassini spacecraft. ... Image File history File links Download high resolution version (1000x1000, 67 KB) Thethys (satellite of Saturn) imaged by the Cassini spacecraft. ... Atmosphere none Tethys (tee-thÉ™s or teth-É™s, IPA , Greek Τηθύς) is a moon of Saturn that was discovered by Giovanni Domenico Cassini in 1684. ... Download high resolution version (756x744, 35 KB)This picture of Dione was take by Voyager 1 from a range of 162,000 kilometers (100,600 miles) on November 12, 1980. ... Download high resolution version (756x744, 35 KB)This picture of Dione was take by Voyager 1 from a range of 162,000 kilometers (100,600 miles) on November 12, 1980. ... Atmosphere none Dione (dye-oe-nee, Greek Διώνη) is a moon of Saturn discovered by Giovanni Cassini in 1684. ... A nonce word is a word used only for the nonce—to meet a need that is not expected to recur. ... Louis XIV King of France and Navarre By Hyacinthe Rigaud (1701) Louis XIV (Louis-Dieudonné) (September 5, 1638–September 1, 1715) reigned as King of France and King of Navarre from May 14, 1643 until his death. ... gros pd]], enfoire at Nançay. ...

The name was modelled on Sidera Medicea, "Medicean stars", the Latin name used by Galileo to name the four Galilean satellites of Jupiter, in honor of the Florentine house of Medici. Galileo Galilei (February 15, 1564 – January 8, 1642) was an Italian physicist, astronomer, and philosopher who is closely associated with the scientific revolution. ... Jupiters 4 Galilean moons, in a composite image comparing their sizes and the size of Jupiter (Great Red Spot visible). ... Adjective Jovian Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... The Medici coat of arms The Medici family was a powerful and influential Florentine family from the 13th to 17th century. ...

The following contemporary (1686) notice records Cassini's choice of name, and explains his rationale for the same:

Louis XIV

In the Conclusion, the Discoverer considers that the Antient Astronomers, having translated the Names of their Heroes among the Starrs, those Names have continued down to us unchanged, notwithstanding the endeavour of following Ages to alter them; and that Galileo, after their Example, had honoured the House of the Medici with the discovery of the Satellites of Jupiter, made by him under the Protection of Cosmus II; which Starrs will be always known by the Name of Sidera Medicea. Wherefore he concludes that the Satellites of Saturn, being much more exalted and more difficult to discover, are not unworthy to bear the Name of Louis le Grand, under whose Reign and in whose Observatory the same have been detected, which therefore he calls Sidera Lodoicea, not doubting but to have perpetuated the Name of that King, by a Monument much more lasting than those of Brass and Marble, which shall be erected to his Memory. [1]

Image File history File links Download high resolution version (534x638, 221 KB) Beschreibung Louis XIV. 1661 Charles le Brun Licensing File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Louis XIV of France ... Image File history File links Download high resolution version (534x638, 221 KB) Beschreibung Louis XIV. 1661 Charles le Brun Licensing File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Louis XIV of France ... Image File history File links Cquote1. ... Cosimo II de Medici, Grand Duke of Tuscany (12 May 1590 – 28 February 1621) ruled as Grand Duke of Tuscany from 1609 to 1621. ... Louis XIV King of France and Navarre By Hyacinthe Rigaud (1701) Louis XIV (Louis-Dieudonné) (September 5, 1638–September 1, 1715) reigned as King of France and King of Navarre from May 14, 1643 until his death. ... Image File history File links Cquote2. ...

Notes

1. ^ Philosophical Transactions, Vol. 16, p. 85 (1686): An Extract of the Journal Des Scavans. of April 22 st. N. 1686. Giving an account of two new Satellites of Saturn, discovered lately by Mr. Cassini at the Royal Observatory at Paris.