10 Largest Megastructures In Star Trek

10. The Whale Probe

Considering it's entirely featureless hull, it's pretty difficult to determine the exact size of the whale probe from The Voyage Home, but it is undeniably massive.

Don Dow, the Effects Director Of Photography on the film has stated that the probe was meant to measure five miles long and a mile-and-a-half wide. However, many fans have noticed that this is way too small to be true, based mostly on shots from the film where the probe can be directly compared to Spacedock One. The Ex Astris Scientia article estimated the probes length at a whopping 50 km from direct observations.

This really makes you wonder why the probe needed to be so large. Was it simply an automated communication device, or could there be an interior, or possibly even a crew of large, cetacean aliens. It seems ridiculous to construct such a massive vessel for a task as simple as saying ‘hi’ to some whales. Regardless, the probes absurd size definitely contributes to its mystique.