Nasa's Cassini spacecraft.
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Caption: NASA's Cassini spacecraft captured this image of Saturn's moon Dione, coming within 310 miles of Dione's cratered surface during a flyby fly·by also fly-by
n. pl. fly·bys
A flight passing close to a specified target or position, especially a maneuver in which a spacecraft or satellite passes sufficiently close to a body to make detailed observations without on October 11. Saturn, a "gas giant" planet consisting mostly of hydrogen and helium, appears in the background. The thin horizontal lines (Descriptive Geometry & Drawing) a constructive line, either drawn or imagined, which passes through the point of sight, and is the chief line in the projection upon which all verticals are fixed, and upon which all vanishing points are found.
See also: Horizontal are Saturn's rings See Saturn.
See also: Ring , which are made up of billions of particles of rock and ice. Dione, one of Saturn's 34 known moons, is mostly ice.
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