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A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

For questions dealing with the political body with authority over a nation or world and its people.
693 questions
For questions that have to do with chemistry, chemical reactions be they biological or artificial, or the industrial processes of chemistry.
For questions dealing with how bodies interact with each other in space via gravitation.
For questions about rocks, minerals and the physical structure and substance of the world.
628 questions
For questions about the development and usage of powers and abilities beyond what is "normal" for a specific species.
622 questions
For questions related to planets, moons, stars and other celestial objects, and their motion on the sky.
For questions concerning species that have settled on or near celestial bodies they are not native to and the challenges this presents.
619 questions
For questions related to plants and vegetation in general.
604 questions
For questions about the physical structure of an organism.
For questions about the use of engineering to create structures and devices in other worlds, including whether or not a device could be made or what materials would be needed to make a device.
576 questions
For questions related to the climate, temperature and precipitation that a world might experience. Compare [climate] and [seasons].
For questions relating to travel in time. Such travel may involve FTL travel; consider also using the [faster-than-light] tag.
542 questions
For questions about groups of societies and their defining characteristics and achievements.
536 questions
For questions about animals or non-sentient beings that are not found on Earth. These can be anything from dragons to Pegasus to your own made-up creature. They just need to not exist on this Earth.
534 questions
For questions relating to the structure or relations regarding a fictional military or its parts.
534 questions
For questions about cities, their systems and evolution.
527 questions
For questions regarding the chemistry of living organisms.
521 questions
For questions about sources of power, generation, storage, how much is needed to perform different tasks, etc.
495 questions
For questions concerning the immediate future, where technology is assumed to have advanced slightly while still recognizable to modern humans. Questions utilizing this tag should focus on a particul…
489 questions
For questions about sources and types of nutrition for a living organism.
483 questions
For questions about planet Earth as we know it. Changed Earths (extra moon, closer solar orbit, etc) should use the [earth-like] tag.
468 questions
For questions about luminous spheres of plasma held together by their own gravity, generally comprised primarily of hydrogen and helium.
454 questions
For questions dealing with events during an apocalypse scenario. Do not use for post-apocalyptic settings.
453 questions
For questions about the written or spoken language of a world.
450 questions
For questions about the viability of life in certain conditions. For example, it could be used in questions asking about the possibility of life on a planet or other astronomical body.
447 questions
For questions involving dragons - generally large, reptilian, flying creatures famous in folklore and myths.
444 questions
For questions regarding the properties and applications of both fictional and real materials.
441 questions
For questions regarding the impact of religion in a given scenario or the creation of a religion for use in a fictional world.
439 questions
For questions regarding artificial structures that exist in space.
431 questions
For questions about the process of creating a new world or changing and developing an existing one, as opposed to questions about some element of the world being created or changed. NOTE that this is …
419 questions
For questions relating to the exchange of ideas and information between beings.
417 questions
For questions based on computers and other like devices having human-like intelligence.
410 questions
For questions about worlds other than Earth that are significantly different. This could be a water, ice, barren or other planet. For questions about planets similar to Earth with specific differenc…
395 questions
For questions regarding a star and the area comprising its gravitational dominance. While they are not part of its technical definition, it colloquially refers to the planets, moons, asteroids and ot…
369 questions
For questions related to the act or process of flying through an atmosphere. Includes any means of propelling oneself through the atmosphere of a world, including biological or technological. Does not…
363 questions
For questions relating to the thoughts and decision making processes of beings.
363 questions
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