Cassini may refer to:
- Cassini family:
- Giovanni Domenico Cassini (1625–1712), Italian mathematician, astronomer, engineer, and astrologer
- Jacques Cassini (1677–1756), French astronomer, son of Giovanni Domenico Cassini
- Cesar-François Cassini de Thury (1714–1784), French astronomer and cartographer, son of Jacques Cassini
- Jean-Dominique, comte de Cassini (1748–1845), French astronomer, son of Cesar-François Cassini de Thury
- Alexandre Henri Gabriel de Cassini (1781–1832), French botanist and naturalist, son of Jean-Dominique de Cassini
- Cassini's laws on the motion of the Moon
- Cassini Division, a gap in the rings of Saturn
- Cassini–Huygens, the space mission to examine Saturn and its moons, of which the 'Cassini' orbiter was a part
- Cassini (Martian crater)
- Cassini (lunar crater)
- 24101 Cassini, an asteroid
- 24102 Jacquescassini, another asteroid
- Cassini Regio, the dark region of the moon Iapetus
- This list was truncated from 8 items.
- Casini, a surname
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