what was the former person's profession?
He was an mathematician, astronomer and engineer.
Giovanni Domenico Cassini
Giovanni Domenico Cassini, also known as Jean-Dominique Cassini (8 June 1625 – 14 September 1712) was an Italian (naturalised French) mathematician, astronomer and engineer. 
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.
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Giovanni Domenico Cassini [SEP] Introduction
Giovanni Domenico Cassini, also known as Jean-Dominique Cassini (8 June 1625 – 14 September 1712) was an Italian (naturalised French) mathematician, astronomer and engineer. Cassini was born in Perinaldo, near Imperia, at that time in the County of Nice, part of the Savoyard state. Cassini is known for his work in the fields of astronomy and engineering. Cassini discovered four satellites of the planet Saturn and noted the division of the rings of Saturn; the Cassini Division was named after him. Giovanni Domenico Cassini was also the first of his family to begin work on the project of creating a topographic map of France.