Memory Alpha
Memory Alpha

Smoke was a visible collection of a variety of solid, liquid, and gas particles left unburned during the combustion process.

In 2269, when told to commence his sensor sweep by James T. Kirk and before being cut off by a loud noise, Arex said, "Sensors show crystalline surface heavily fractured by lava flows. Ash and smoke suspended in oxygen-nitrogen atmosphere." (TAS: "The Terratin Incident")

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