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True color image of the Earth from space. This image is a composite image collected over 16 days by the MODIS sensor on NASA’s Terra satellite. NASA Earth science satellite fleet as of September 2020, planned through 2023. Earth observation satellite missions developed by the ESA as of 2019.
(See Other moons of Earth and Quasi-satellite.) Mars has two known moons, Phobos and Deimos ("fear" and "dread", after attendants of Ares, the Greek god of war, equivalent to the Roman Mars). Searches for more satellites have been unsuccessful, putting the maximum radius of any other satellites at 90 m (100 yd). [4]
A satellite in a geostationary orbit appears stationary, always at the same point in the sky, to ground observers. Popularly or loosely, the term "geosynchronous" may be used to mean geostationary. [1] Specifically, geosynchronous Earth orbit (GEO) may be a synonym for geosynchronous equatorial orbit, [2] or geostationary Earth orbit. [3]
List of Earth observation satellites; Timeline of first Earth observation satellites; A. A-train (satellite constellation) ... Soraya (satellite) Space-based radar ...
This category is for artificial satellites that have obtained orbit around the Earth. ... Pages in category "Satellites orbiting Earth" ... Infrared Space Observatory ...
Missions with specific targets within the Solar System (e.g., the Sun and its planets), are excluded; see List of Solar System probes for these, and List of Earth observation satellites for missions targeting Earth. Two values are provided for the dimensions of the initial orbit.
Hubble Space Telescope (6 C, 41 P) J. Jason satellite series (6 P) T. Television Infrared Observation Satellites (44 P) Pages in category "NASA satellites orbiting Earth"
To an observer on the rotating Earth, the red and yellow satellites appear stationary in the sky above Singapore and Africa respectively. Synchronous orbit: An orbit whose period is a rational multiple of the average rotational period of the body being orbited and in the same direction of rotation as that body. This means the track of the ...