Editing Kardashev scale (section)

=== Type&nbsp;II civilization methods ===
[[Image:Dyson Swarm - 2.png|right|thumb|A figure of a [[Dyson Swarm|Dyson swarm]] surrounding a star|alt=]]
* Type&nbsp;II civilizations could use the same techniques as a Type&nbsp;I civilization, but applied to a large number of planets in a large number of star systems.
* A [[Dyson sphere]] or [[Dyson swarm]] and similar constructs are hypothetical [[megastructure]]s originally described by [[Freeman Dyson]] as a system of orbiting [[solar power satellite]]s designed to completely encircle a [[star]] and capture most or all of its energy output.<ref>{{Cite news |last=Dyson |first=Freeman J. |author-link=Freeman Dyson |editor-last=Marshak |editor-first=R. E. |title=The Search for Extraterrestrial Technology |newspaper=Perspectives in Modern Physics |publisher=[[John Wiley & Sons]] |place=New York |date=1966 |bibcode=1966pmp..book..641D}}</ref>
* Another means of generating usable energy would be to feed a stellar mass into a [[black hole]], and collect the photons emitted by the [[accretion disk]].<ref>{{cite web |last=Newman |first=Phil |title=New Energy Source "Wrings" Power from Black Hole Spin |publisher=[[NASA]] |date=2001-10-22 |url=http://www.gsfc.nasa.gov/topstory/20011015blackhole.html |access-date=2008-02-19 |archive-url=https://web.archive.org/web/20080209231442/http://www.gsfc.nasa.gov/topstory/20011015blackhole.html <!-- Bot retrieved archive --> |archive-date=2008-02-09}}</ref><ref>{{cite book |last=Schutz |first=Bernard F. |title=A First Course in General Relativity |publisher=[[Cambridge University Press]] |date=1985 |location=New York |pages=304, 305 |url=https://books.google.com/books?id=qhDFuWbLlgQC |isbn=978-0-521-27703-7 |access-date=2019-07-29 |archive-date=2020-07-10 |archive-url=https://web.archive.org/web/20200710105132/https://books.google.com/books?id=qhDFuWbLlgQC |url-status=live |via=[[Google Books]]}}</ref> A less exotic means would be to simply capture photons already escaping from the accretion disk, thereby reducing a black hole's [[angular momentum]]; this is known as the [[Penrose process]]. However, this may only be possible for a Type&nbsp;III civilization.
* [[Star lifting]] is a process by which an advanced civilization could remove a substantial portion of a star's matter in a controlled manner for other uses.
* [[Antimatter]] is likely to be produced as an industrial [[byproduct]] of a number of [[megascale engineering]] processes (such as the aforementioned star lifting), and could therefore be recycled.{{citation needed|date=July 2014}}
* In [[star system|multiple star systems]] with a sufficiently large number of stars: absorbing a small but significant fraction of the output of each individual star.
* [[Stellar engine]]s can be used to move stars.