You can't have science fiction without science and fiction. This trips a lot of people up, surprisingly. Some folks forget the science part and think franchises like Lord of the Rings or Harry Potter count, just because they're made up. I hate to break it to you, but that's fantasy. No, science fiction means that the world is extrapolated from our own. It draws from our existing technology, history, and culture, but imagines a different version of it, made semi-plausible by technological advances. Fantasy, however, are worlds that are totally different from our own, made up on a different premise.
But these genres get lumped together just because they include funny names and strange creatures. And maybe because nerds like them. But these memes traffic squarely in the realm of science fiction… I'm pretty sure. Don't quote me on that. Just enjoy the memes, okay? That's all they're here for.