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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“If you would feel the full force of a tempest, take up your residence on the top of Mount Washington, or at the Highland Light, in Truro.”
—Henry David Thoreau (1817–1862)