I'm writing science fiction short stories and intend to later expand and stitch them together into a science fiction novel.
My problem is that (e.g.) the scenery is left / the destination point is arrived at too quickly. This doesn't mean that the story needs to be over at that point but most of the times it more or less asks for a new chapter.
Many times I could expand them as I often just basically "explain" a science fiction idea (e.g. by examination/experience of an object/phenomena) where it probably should rather be an exploration of the idea. But not always and often I'm not sure how. At the same time I aim to have the story be as non-vacuous as possible.