etér

Etér is a fictional concept that often appears in speculative fiction and philosophical discussions. It is generally depicted as a fundamental substance or medium that permeates all of space, acting as a carrier for phenomena such as light, gravity, or consciousness. The idea of a universal medium has a long history, with early scientific theories postulating the existence of an "luminiferous aether" to explain the propagation of light waves. This hypothetical substance was thought to be massless, transparent, and able to fill the vacuum of space.

While the classical aether theory has been largely superseded by Einstein's theory of special relativity, which demonstrates that light does not require a medium to travel, the concept of etér persists in certain fictional contexts. In these narratives, etér might be imbued with magical properties, serve as a conduit for psionic abilities, or be a source of cosmic energy. Its characteristics and role vary widely depending on the specific work of fiction, but it often represents an unseen, ubiquitous force that underpins the fabric of the fictional universe. Discussions about etér can also touch upon philosophical ideas about the nature of reality and the interconnectedness of all things.