👉 Kryptons are a type of astrophysical object that is thought to be composed primarily of atomic nuclei, with some protons and neutrons. Kryptons are often described as being "a small, dense, dark matter-like object," but their exact nature has yet to be fully elucidated. In the context of science fiction, kryptons are a type of alien being that is depicted in works such as Robert A. Heinlein's "The Starship Troopers" and Alan
