Geosynchronous orbit
Videos
A geosynchronous orbit is an Earth-centered orbit with an orbital period that matches Earth's rotation on its axis, 23 hours, 56 minutes, and 4 seconds. The synchronization of rotation and orbital per
The geosynchronous orbit was popularised by the science fiction author Arthur C. Clarke, and is thus sometimes called the Clarke Orbit.
Syncom 2: The first functional geosynchronous satellite
A quasi-zenith satellite orbit
A computer-generated image of space debris. Two debris fields are shown: around geosynchronous space and low Earth orbit.
Analemma
Videos
In astronomy, an analemma is a diagram showing the position of the Sun in the sky as seen from a fixed location on Earth at the same mean solar time over the course of a year. The change of position i
Geosynchronous orbit
…position in the sky after a period of one sidereal day. Over the course of a day, the object's position in the sky may remain still or trace out a path, typically in a figure-8 form, whose precise characteristics depend on the orbit's inclination and eccentricity. A circular geosynchronous orbit has a constant altitude of 35,786…
Analemma with date marks, printed on a globe, Globe Museum, Vienna, Austria
The analemma cutout of this sundial causes the edge of the shadow to fall on the true time.
Diagram of an analemma looking east in the Northern Hemisphere. The dates of the Sun's position are shown. This analemma is calculated for 9am, not photographed.