CAPE CANAVERAL, Fla. (CBS/AP) — The Cassini spacecraft is about to get an icy shower as it orbits Saturn.

On Wednesday, Cassini will storm through a jet of water vapor and frozen particles erupting from the south pole of Enceladus, one of Saturn’s many moons.

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VIDEO: Courtesy NASA

The spacecraft will zoom within 30 miles of the moon’s south pole, providing the best sampling yet of its underground ocean.

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Cassini will be traveling 19,000 mph, so it should take an instant to penetrate the plume.

A global liquid ocean is believed to exist beneath the frozen crust of 300-mile-wide Enceladus. Wednesday’s dive will be the deepest one yet through one of its plumes.

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Launched in 1997, Cassini isn’t equipped to detect life. But scientists hope Wednesday’s flyby will shed light on the potential habitability of Enceladus’ ocean.

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