Beta Renner Cloud

History:
An intelligent, spaceborne entity. The Enterprise-D encountered the life-form near Beta Renner star system in 2364. This entity came aboard the starship and entered the neural systems of several Enterprise-D members, including Captain Picard, in an attempt to establish communications with life-forms it considered extremly alien.
TNG "Lonely Among Us"
The cloud did not have a formal name in the episode.
Star Trek Encyclopedia II

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