A nebula where the Enterprise-D found a T-Tauri type star with an unexpected Class M planet in 2367, and where the whole crew lost a day to the isolationist Paxans.
The Ngame Nebula is an interstellar cloud in a little-visited region of space. It is the setting of the fourth-season Next Generation episode Clues.
In 2367 the Enterprise-D investigates a T-Tauri type star system within the nebula that appears, improbably, to have a habitable planet. What seems to be a small wormhole opens, the crew are knocked out, and Data tells them on waking that only thirty seconds have passed. Small discrepancies soon accumulate: moss cultures that have grown too much, a dislocated wrist Worf cannot explain, and a chronometer that has been reset.
The truth is that the Paxans, a powerful and reclusive species, stun any ship that comes near so that it will drift away. When that failed, Picard agreed that the crew's memories would be wiped and ordered Data to conceal everything. A second attempt removes the clues.