The old masters spoke to the world
I've never met a musician who didn't appreciate (if not enjoy) classical music. Even punk musicians appreciate classical music. It's layered, addresses emotion, it's BIG. It was an era where a precious handful of people were so honking creative and fabulously capable with the instruments that it produced a sweeping array of sound that affected the entire world.
In all the centuries since, very very few artists have attained either the popularity or the recognizability of the classical masters.
Will everyone on a space ship prefer classical music over, say, classic guitar, Jazz, blues, country, Acid... That's unrealistic.
But if it was the only music available? Some would get bored with it, but honestly, humans get bored all the time. How many of us float through our day permanently wired to our tunes? My own playlist is about 200 songs long and there are days that I'm sick of listening to them.
But, ignoring the question "why couldn't you bring other music along?" (by the time we're sailing through space in elegant starships the Beatles will be in the public domain), why only classical music?
Even at it's most explosive, it's not raucous. You can't really head-bang to the 1812 overture. I mean, you could... There's cannons, after all... but it's just not the same. You can't lose your self control to classical music like you can other genre.
It's rarely played loud. Some people are more interested in the beat than they are the melody. These are the people who, despite their car windows being up, can be heard a mile down the road with enough force to pound nails into the asphalt. I've had days when I turned the volume of classical music up, but to claim that it's loud would be a lie. This is important on a ship where you will meet the same small group of people every morning for breakfast for months if not years.
It's common to us all. Humans tend to find things that divide us ("I'm a little bit country... I'm a little bit rock-and-roll" sang Donny and Marie Osmond). Classical music is such a common part of our shared heritage that it tends to have a binding effect rather than a divisive effect (my perspective). How often do you see biker-vs-cowboy fights in the movies? OK, how often do you see Bach-vs-Mozart fights? You get my point.
And, last but in no way least...
The captain likes classical music. We like to think that the world is a democracy, but starships aren't. ("This isn't a #*@%! democracy!" screams Matthew McConaughey in U-571.) And if the captain loves classical music, then you better keep our ipod full of Reggae and Bubblegum Rock under your pillow.
2Your question is about two things ; why sci-fi movies use classical music sometimes and why the characters in them are supposed to like it. Both of these are off-topic for WB. You might try the Scif-fi SE but I suspect it's either too broad or too opinion based for them as well. – StephenG – 2018-06-10T15:46:35.710
4Because classical music is often public domain thus cheap, plus inventing new "future" music is costly and as likely to sound tacky and alienate an audience as it is to add to the atmosphere. People also tend to associate classical music with intellect and class. – TCAT117 – 2018-06-10T15:54:38.960
5What's not to like about classical music? – JBH – 2018-06-10T15:57:30.380
3Why do you think classical music is 'really old'? Lots of new, great orchestral music is being composed today. – user535733 – 2018-06-10T16:02:45.810
@user535733 even today's orchestral music is "really old" looking back from sci-fi perspective – Pavel Janicek – 2018-06-10T16:39:49.527
2Attention VTCers! Considering our [Help] tells us worldbuilding can be
larger than a multiverse or smaller than a villageand questions that areHow to achieve a specified effect in a defined world, including by the use of biology, technology or magic, while maintaining in-universe consistencyare specifically on-topic - why, exactly, do you think this is off-topic? – JBH – 2018-06-10T16:58:52.77011Since classical music was composed centuries ago, and is still being composed today, why won't it be composed in the future also? – user535733 – 2018-06-10T17:35:07.977
@user535733: Really? For some reason I seem not to have heard any, other than the occasional movie soundtrack. – jamesqf – 2018-06-10T18:47:31.623
1What makes "classical" music "classical" is not its style, but it's longevity within its style. Schubert, Beethoven, and Mozart all wrote very different styles of music, yet we call all of them "classical". Salieri wrote similar style and time and place to Mozart, but he is barely remembered (apart from as a footnote in the movie Amadeus).
Music labels are marketing tools. When Usher sings, it's "rhythm and blues". Justin Bieber sings the exact same songs with the same backup track and (original artist) Usher singing backup vocals, it's called "Pop". – pojo-guy – 2018-06-10T20:05:02.893
1
Two words: "Space Opera".
– OnoSendai – 2018-06-10T21:20:06.867I'm surprised you haven't mentioned the iconic piece that's much more commonly associated with the movie, which is a composition by a man also named Strauss, albeit from a different family :) I'm speaking specifically of "Thus Spoke Zarathustra" by Richard Strauss. Of course, it wouldn't necessarily be considered classical music, but definitions of that term seem to vary. – rhino – 2018-06-11T00:24:23.663
Good example of "modern" classical music: Aaron Copland's Appalachian Spring (1944). This is a classic - listen to it and you should recognize it immediately. – Robert Columbia – 2018-06-11T00:36:27.600
This was put on hold as off-topic. To me, the question seems along the lines of "Lots of sci-fi uses classical music. I'd like to use classical music in the starship in my world too, as it will be somehow be part of the plot, but I need justification" – manassehkatz-Moving 2 Codidact – 2018-06-11T02:45:11.050
1To be honest, I don't know why this question was voted as 'Off-topic' - it is perfectly relevant to world building and is actually providing useful and good answers. I have an opinion that many questions are placed on-hold for spurious reasons: 'Off-topic' is subjective and ill-defined. I can understand Duplicate or 'Unsure what is asked', but my opinion is this question is perfectly valid. Furthermore it is useful to all who search for it in the future, and debate should not be stifled based on interpretation of what 'topic' is off or not. – flox – 2018-06-12T11:59:35.857