is it possible to name any one of them?
Iapetus and Rhea , and Tethys and Dione.
Giovanni Domenico Cassini
Cassini observed and published surface markings on Mars (earlier seen by Christiaan Huygens but not published), determined the rotation periods of Mars and Jupiter, and discovered four satellites of Saturn: Iapetus and Rhea in 1671 and 1672, and Tethys and Dione (
which planet is saturn? It is the sixth planet from the sun. tell me one of its physical features? It is a gas giant with an average radius of about nine times that of Earth. what is this last one you mentioned? Earth is the third planet from the Sun how is the atmosphere around the former planet? The outer atmosphere of Saturn contains 96.3% molecular hydrogen and 3.25% helium by volume. which spacecraft was sent to it? The "Cassini–Huygens" space probe . which ring does it has? It has planetary rings composed mostly of water ice. where did the probe get its name from? From Giovanni Domenico Cassini and Christiaan Huygens. when was it sent to that particular thing in the space? 15 October 1997. what was the former person's profession? He was an mathematician, astronomer and engineer. what does the second one do in general? An astronomer is a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth. was this field present during ancient times also? Yes, it was concerned with the classification and description of phenomena in the sky. what is still unsolved in this field? UNANSWERABLE can you tell me any one thing that the former person had done when he was in this field? Cassini discovered four satellites of the planet Saturn and noted the division of the rings of Saturn.
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Giovanni Domenico Cassini [SEP] Astronomer
Cassini was an astronomer at the Panzano Observatory, from 1648 to 1669. He was appointed professor of astronomy at the University of Bologna in 1650 and became, in 1671, director of the Paris Observatory. He thoroughly adopted his new country, to the extent that he became interchangeably known as Jean-Dominique Cassini – although that is also the name of his great-grandson, Dominique, comte de Cassini. Cassini observed and published surface markings on Mars (earlier seen by Christiaan Huygens but not published), determined the rotation periods of Mars and Jupiter, and discovered four satellites of Saturn: Iapetus and Rhea in 1671 and 1672, and Tethys and Dione (1684).