Since stars don't have hands to write, they don't literally write anything in a human sense. However, we can think about what kind of stories the universe itself might tell through the actions of stars.
Here are some possibilities:
1. Cosmic Epic Poems: Imagine the birth, life, and death of stars as a vast, sweeping poem. The creation of stars from nebulae, their fiery lives burning hydrogen, and their eventual collapse into supernovae or white dwarfs could be chapters in a grand cosmic saga.
2. Science Fiction: The formation of planets, the search for life beyond Earth, and the sheer vastness of space are all themes that fit comfortably within science fiction.
3. Fantasy: The power and mystery of stars, their ability to guide sailors and influence the tides, could be interpreted as magical elements in a fantasy world.
4. Mystery: The secrets hidden within the light from distant stars, the unsolved mysteries of dark matter and dark energy, and the unknown potential of the universe can inspire a sense of mystery and intrigue.
5. Philosophical Essays: The existence of stars, their life cycles, and their potential for hosting life could inspire profound reflections on the nature of existence, time, and the universe.
Ultimately, the "genre" of what the stars write is up to your imagination! The universe is a vast and inspiring place, and the stories it tells are limited only by our own creativity.