An equatorial mount is a mount for instruments that follows the rotation of the sky (celestial sphere) by having one rotational axis parallel to the Earth's axis of rotation. This type of mount is used for astronomical telescopes and cameras. The advantage of an equatorial mount lies in its ability to allow the instrument attached to it to stay fixed on any object in the sky that has a diurnal motion by driving one axis at a constant speed. Such an arrangement is called a sidereal drive.
Read more about Equatorial Mount: Astronomical Telescope Mounts
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“A land of meanness, sophistry and mist.
Each breeze from foggy mount and marshy plain
Dilutes with drivel every drizzly brain.”
—George Gordon Noel Byron (1788–1824)