A kid I worked with loved airplanes. When he played, it became a running joke that there would randomly be "turbulence!" and he'd wiggle around.
One day, he was playing with another kid, but he was a rocket ship this time. The other kid, knowing his joke, decided to playfully bump into him and say, "turbulence!"
This little five year old, with his toddler-esque voice, often asks big questions that can be hard to answer. After this, he asked me, "Is there turbulence in space?"
I mean, yes and no? I explained that it's not turbulence like an airplane experiences, since there's not enough air in space to do that, but there are other forces that can act on a rocket that can change how it moves.
Thankfully, he didn't pry any further, because that's the extent of the knowledge I can ELI5 on that topic. π


