To mark Star Trek's 40th anniversary on 8 September, Christie's in London is exhibiting items, such as costumes from its history, before they go under the hammer in October.
The sale features 1,000 lots and more than 4,000 items from the entire history of the franchise. This Klingon captain's chair is valued at $6,000 to $8,000 (£3,195 to £4,261).
The items on sale in New York range from costumes, models and sets to small props, such as these two prop phaser weapons which were used in Star Trek: Nemesis.
A model of the Starship Excalibur, as seen in Star Trek: The Next Generation, is just one of hundreds of pieces on display at the auction house.
Featured in Deep Space Nine and Star Trek: Enterprise, these imitation fur tribbles are expected to fetch up to $1,500 (£798).
Since the mid-1960s, the franchise has spawned six television series and ten feature films. Spock wore this Vulcan Kolinahr necklace in 1979's Star Trek: The Motion Picture.
This model of the Starship Enterprise-A was used for Star Trek VI: The Undiscovered Country and earlier movies. It is worth $15,000 to $25,000 (£7,990 to £13,318).
This miniature Romulan Warbird model was used in Star Trek: The Next Generation and Star Trek: Deep Space Nine.
Fans of Star Trek may remember this freestanding engineering console created for Starship Enterprise-E, now worth an estimated $5,000 (£2,663).