Editing Telescope mount (section)

== Transit mounts==
Transit mounts are single axis mounts fixed in azimuth while rotating in altitude, usually oriented on a north-south axis. This allows the telescope to view the whole sky, but only when the Earth's rotation allows the objects to cross (''transit'') through that narrow north-south line (the [[Meridian (astronomy)|meridian]]). This type of mount is used in [[transit telescope]]s, designed for precision astronomical measurement. Transit mounts are also used to save on cost or where the instruments mass makes movement on more than one axis very difficult, such as large [[radio telescope]]s.<ref>[https://books.google.com/books?id=wOpaUFQFwTwC&dq=radio+telescope+transit+mount&pg=PA44 Robin Michael Green, '''Spherical Astronomy''', page 45]</ref>