| Cassini, Gian Domenico ... Castilho, Antonio Feliciano de |
| | - Cassini, Gian Domenico
- Italian-born French astronomer who, among others, discovered Cassini's division, the dark gap between the rings A and B of Saturn; he also discovered four of Saturn's moons. In addition, he was the first to record observations of the zodiacal light.
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