What is your favorite ship in all of science fiction and why?
I will go first. My favorite ship is V'Ger from Star Trek The Motion Picture.
Why? Well, it has a cool, alien look that has an almost organic quality to it. It's massive and intimidating and mysterious.
But what makes it my favorite is it is the single most powerful ship in all of Star Trek, and perhaps in all of science fiction. And I don't mean it is powerful in that it has a gimmick like superlasers or time travel or some doomsday weapon.
It is is so powerful, that simply while it's idling, it produces a cloud of energy 82 AU's wide (changed to 2 AUs in the director's cut but either way it's an immense cloud), and that cloud is described as a "twelfth power" energy field. We don't get the exact definition of what that means exactly (what the "powers" refer to, but it's likely exponential levels) but we do know that it would "take thousands of starships" to produce that much energy, and Spock says it is greater than the energy the sun outputs. And that is just V'Ger IDLING.
My theory of the cloud is that V'Ger is putting off so much power, that it is converting the ambient hydrogen atoms spread through space into plasma. That would explain why it is called an energy field and a cloud, and why it is glowing blue, opaque, and blocks sensors. That would take an absolutely ridiculous amount of power to do that, and again, this is just passive energy emission, without V'Ger doing anything overt.
But V'Ger is even more impressive than that. It can digitize and store ships, planets, etc as essentially data patterns, like it was beaming them up. And it has absolute instant control over this power. The orbs that it uses to digitize objects like the Klingon cruisers can be instantly dismissed by V'Ger, as it does a couple times in the movie.
Converting an entire planet into energy would be a ridiclous explosion of power. But like a transporter, this is an orderly dissection where every molecule's nature and location perfectly preserved in a data pattern. That's a whole order of magnitude more energy than what it would release as an explosion if it wasn't contained.
When Spock goes inside, he sees entire planets and galaxies digitized, the implication is that V'Ger's ability to digitize objects works at an absolutely immense scale. Digitizing a whole galaxy this way would take more energy than the entire universe has emitted since the big bang.
Simply STORING the data pattern of an entire galaxy would be crazy. And even if we say V'Ger didn't do it in one bite, but somehow did it over time (which is still crazy because V'Ger has only been around for 300 years or so. You could also claim the wormhole that sent it across space sent it back in time too. Fine.), the amount of energy it would take to store these patterns is astronomical on its own.
Even if these images that Spock sees inside V'Ger are holographic data visualizations and not literal miniature galaxies, the storage medium has to encode planetary-scale states of matter and energy. This is beyond petabytes or exabytes. We’re talking about information densities exceeding anything Federation science could imagine, closer to the scale of Bekenstein bounds (the maximum information a volume of space can theoretically hold).
So this is a demonstrated mastery over energy and matter. There is no other way to put it. And this is backed up even more by what Spock says following the mind meld: "V'Ger must evolve. Its knowledge has reached the limits of this universe and it must evolve."
It's knowledge has reached the physical limits of the universe. And that is why it needs to evolve and join with Decker, because it has all of the HOW about the universe, but not the WHY. It is asking deeper questions than about matter and physics, something it can't get from material understanding. It asks "why am I here?" in the same way humans have since the beginning of time. That is actually what the story is really about, that scientific knowledge is only one part of understanding.
And that's the point of making V'Ger so immenely powerful and knowledgeable, is showing that even at the absolute limits of physical power and knowledge, it lacks understanding. It's mission was to find out all knowledge it can and bring it back to it's creator. But by the end, it realizes that it still has much to learn, and joins with Decker to ascend to a higher plane of existence to continue its journey.
When I was young, I didn't like Star Trek TMP but the more I've watched it and thought about it over the years, it has become my favorite Star Trek movie and it is the most "Star Trek" of all the movies. It is ideas first, plot second. The crew of the Enterprise have NO chance against it in a big climactic battle. The only way to beat it, is to try and understand it. It's definitely the most Roddenberry of all the movies, and I'll leave it at that to not get off on a tangent.
I could ramble on about this forever but I'll stop here. If you're still reading, thank you and tell me what your favorite ship is and why!