Editing Synchrotron radiation (section)

=== From supermassive black holes ===

It has been suggested that [[supermassive black hole]]s produce synchrotron radiation in "jets", generated by the gravitational acceleration of ions in their polar magnetic fields. The nearest such observed jet is from the core of the galaxy [[Messier 87]].  This jet is interesting for producing the illusion of [[superluminal]] motion as observed from the frame of Earth. This phenomenon is caused because the jets are traveling very near the speed of light ''and'' at a very small angle towards the observer. Because at every point of their path the high-velocity jets are emitting light, the light they emit does not approach the observer much more quickly than the jet itself. Light emitted over hundreds of years of travel thus arrives at the observer over a much smaller time period, giving the illusion of faster than light travel, despite the fact that there is actually no violation of [[special relativity]].<ref>{{cite web|last=Chase|first=Scott I.|title=Apparent Superluminal Velocity of Galaxies|url=http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/Superluminal/superluminal.html|access-date=22 August 2012}}</ref>