Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

For questions related to outer space, stellar systems, stars and other astronomical phenomena.

"Space" has historically been a shortened version of the term "outer space", which is regarded as the area beyond Earth's atmosphere, or, more accurately, above the Kármán line. This tag is for questions related to outer space, planetary systems and stars. Do not use this tag merely because it relates to spatial dimensions. Also consider the more specific , and tags: if you're asking about one planet or one star or similar, it is likely that the tag is not specific enough.

Consider using the tag in place of the tag if, for example, relativistic effects are included.

history | excerpt history