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Satellite with an orbital period equal to Earth's rotation period
A geosynchronous satellite is a satellite in geosynchronous orbit, with an orbital period the same as the Earth's rotation period. Such a satellite returns
Geosynchronous_satellite
Orbit keeping the satellite at a fixed longitude above the equator
which is a circular geosynchronous orbit in Earth's equatorial plane with both inclination and eccentricity equal to 0. A satellite in a geostationary
Geosynchronous_orbit
Class of Indian medium-lift expendable launch vehicles, developed by ISRO
Geosynchronous Satellite Launch Vehicle (GSLV) is a class of expendable launch systems operated by ISRO. GSLV has been used in eighteen launches since
Geosynchronous Satellite Launch Vehicle
Geosynchronous_Satellite_Launch_Vehicle
This is a list of satellites in geosynchronous orbit, including satellites in geosynchronous orbit. These satellites are commonly used for communication
List of satellites in geosynchronous orbit
List_of_satellites_in_geosynchronous_orbit
Circular orbit above Earth's Equator and following the direction of Earth's rotation
geostationary orbit, also referred to as a GEO or GSO, is a circular geosynchronous orbit 35,786 km (22,236 mi) in altitude above Earth's equator, 42,164 km
Geostationary_orbit
Satellite-servicing project
Robotic Servicing of Geosynchronous Satellites (RSGS) is a DARPA program to develop a robotic spacecraft capable of rendezvousing, inspecting, and repairing
Robotic Servicing of Geosynchronous Satellites program
Robotic_Servicing_of_Geosynchronous_Satellites_program
Indian expendable medium-lift launch vehicle, developed by ISRO
Vehicle for low Earth orbit and polar launches and the larger Geosynchronous Satellite Launch Vehicle for payloads to geostationary transfer orbit (GTO)
LVM3
Diagrammatic representation of Sun's position over a period of time
are used for radio communication with geosynchronous satellites often have to move so as to follow the satellite's daily movement around its analemma. The
Analemma
Spaceport in Sriharikota, Andhra Pradesh, India
launch pads used for launching sounding rockets, polar satellites and geosynchronous satellites. India's Lunar exploration probes Chandrayaan-1, Chandrayaan-2
Satish_Dhawan_Space_Centre
Series of Indian communications satellites
The GSAT (Geosynchronous Satellite) series is a family of Indian communications satellites, indigenously developed and operated by the ISRO. The prorgamme
GSAT
Chairman of the Indian Space Research Organisation
advanced Radar Imaging Satellite. India's standing in the global space market was enhanced as PSLV launched 18 commercial satellites for 11 countries. Through
Koppillil_Radhakrishnan
Type of satellite in sync with another orbit
astronomical unit for quasi-satellites of Earth such as 2014 OL339. The word "geosynchronous" is sometimes used to describe quasi-satellites of the Earth, because
Quasi-satellite
American satellite and space systems manufacturer
March 2025[update], there were 99 Lanteris-built geosynchronous satellites operating in orbit. Lanteris manufactures satellites based on its Lanteris 1300 series platform
Lanteris_Space_Systems
applicable only for Geostationary and Geosynchronous satellites. India had three continuous successful satellite launches from its first generation rocket
List_of_Indian_satellites
Main body and structural component of the satellite
specific mission. They are commonly used for geosynchronous satellites, particularly communications satellites, but are most commonly used in spacecraft
Satellite_bus
Launch vehicles developed and operated by ISRO
launches placing hundreds of Indian and foreign satellites into orbit. Status: Active The Geosynchronous Satellite Launch Vehicle is a medium-lift launch vehicle
Launch_vehicles_of_ISRO
from satellites, especially distant geosynchronous satellites. Bouncing a signal off a geosynchronous satellite takes about a quarter of a second, which
Satellite_delay
American military space surveillance program
Geosynchronous Space Situational Awareness Program (GSSAP) or Hornet is a class of United States spy satellites. The first two GSSAP spacecraft, GSSAP
Geosynchronous Space Situational Awareness Program
Geosynchronous_Space_Situational_Awareness_Program
Transfer orbit used to reach geosynchronous or geostationary orbit
and an apogee as high as geostationary orbit (GEO). Satellites that are destined for geosynchronous orbit (GSO) or GEO are often put into a GTO as an intermediate
Geostationary_transfer_orbit
orbits (GEO), 10 in 55° inclined geosynchronous orbits (IGSO) and 27 in Medium Earth orbits (MEO). Furthermore, 8 satellites (4 in Medium Earth orbit, 2 in
List_of_BeiDou_satellites
American military satellite communication system
contact geosynchronous satellites. The high apogee meant that the polar regions were visible for long amounts of time, and only two satellites were required
Satellite_Data_System
Spacecraft end-of-life orbit
graveyard orbit is a supersynchronous orbit well beyond geosynchronous orbit. Some satellites are moved into such orbits at the end of their operational
Graveyard_orbit
spaceflight launches in October–December 2026. "China launches new marine satellite". Xinhuanet. 2 July 2026. Retrieved 3 July 2026. https://www.spacex
List of spaceflight launches in July–September 2026
List_of_spaceflight_launches_in_July–September_2026
UAE-based satellite telecommunications company
Arab Emirates-based regional mobile-satellite service (MSS) provider. The company operates two geosynchronous satellites and provides telecommunications coverage
Thuraya
Weather satellite program of the United States
Meteorological Satellite (SMS) program, was a program where NASA developed two weather satellites; which were placed into geosynchronous orbit. SMS-1 was
Synchronous Meteorological Satellite
Synchronous_Meteorological_Satellite
Class of SIGINT spy satellites
space. By positioning a geosynchronous satellite in the path of the beam, the microwave beam can be received. The satellites had a mass of approximately
Aquacade_(satellite)
2025 Indian satellite launch mission
back to the US for corrections. NISAR lifted off aboard an ISRO Geosynchronous Satellite Launch Vehicle (GSLV) rocket at 5:40 p.m. IST on the 30th of July
GSLV_F16
Frequency bands used by Long Term Evolution networks
operation Band 246 only applies for LTE-based 5G Broadcast over Geosynchronous Satellite in region 3 The following table shows the standardized LTE bands
LTE_frequency_bands
Refueling, repairing, or boosting the orbit of satellites
aim to recycle retired satellite parts into new on-orbit satellite assets, principally focused on satellites in the geosynchronous Clarke Belt. The project
On-orbit_satellite_servicing
Chinese global navigation satellite system
US's GPS. It comprises satellites in three types of orbits: 24 in medium Earth orbit (global coverage), 3 in inclined geosynchronous orbit (Asia–Pacific
BeiDou
2025 Indian satellite launch mission
Navigation Sat Mission". www.ndtv.com. Retrieved 2025-02-01. "Geosynchronous Satellite Launch Vehicle Mark II". 20 May 2023. "GSLV-F15 NVS-02 Mission"
GSLV_F15
the coming of communications satellites in synchronous orbit around the Earth. Clarke pointed out that three satellites in the equatorial plane orbit
Electronics_World
Indian government space program administrator
Satellite Launch Vehicle (PSLV) and the Geosynchronous Satellite Launch Vehicle (GSLV) to place IRS and INSAT class satellites in orbit. In 1961, the Government
Department_of_Space
Joint NASA-ISRO synthetic radar aperture spacecraft
where it arrived following day. NISAR lifted off aboard an ISRO Geosynchronous Satellite Launch Vehicle rocket at 5:40 p.m. IST on the 30th of July 2025
NISAR_(satellite)
1960s and 80s NASA program to develop communications satellites
"synchronous communication satellite") started as a 1961 NASA program for active geosynchronous communication satellites, all of which were developed
Syncom
Indian expendable launch vehicle
payload fairing India portal Rocketry portal Spaceflight portal Geosynchronous Satellite Launch Vehicle – Class of Indian medium-lift expendable launch
Polar Satellite Launch Vehicle
Polar_Satellite_Launch_Vehicle
Satellite-provided Internet
commercial communications satellite was Telstar 1, built by Bell Labs and launched in July 1962. The idea of a geosynchronous satellite—one that could orbit
Satellite_Internet_access
Family of communications satellites
that satellite failed to reach geosynchronous orbit upon its launch on 7 December 1979. Shortly after its launch, Satcom 1 was the first satellite used
Satcom_(satellite)
American communications satellite
could be transferred. These TDRSS satellites are all designed and built to be launched to and function in geosynchronous orbit, 35,786 km (22,236 mi) above
Tracking and data relay satellite
Tracking_and_data_relay_satellite
Indian small-lift launch vehicle
PSLV and Geosynchronous Satellite Launch Vehicle (GSLV) and horizontally like the retired Satellite Launch Vehicle (SLV) and Augmented Satellite Launch
Small Satellite Launch Vehicle
Small_Satellite_Launch_Vehicle
Satellite navigation system
(22,000 mi) above Earth's surface. The remaining four satellites are in inclined geosynchronous orbit (GSO). Two of them cross the equator at 55° E and
Indian Regional Navigation Satellite System
Indian_Regional_Navigation_Satellite_System
Artificial satellite that relays radio signals
satellites was the Hughes Aircraft Company's Syncom 2, launched on 26 July 1963. Syncom 2 was the first communications satellite in a geosynchronous orbit
Communications_satellite
Group of telecommunications satellites
satellites in either geosynchronous orbit (GEO) or low Earth orbit (LEO). Although previous satellite internet services primarily used geosynchronous
O3b
PanAmSat communications satellite
HGS-1 and then PAS-22, was a geosynchronous communications satellite, which was salvaged from an unusable geosynchronous transfer orbit (GTO) by means
PAS-22
Class of United States spy satellites
T. Flohrer; R. Choc; B. Bastida (February 2011). "CLASSIFICATION OF GEOSYNCHRONOUS OBJECTS ISSUE 13". ESA. Archived from the original on 13 July 2011.
Orion_(satellite)
normal launch. After separation, the satellites were commanded to burn their ion thrusters. SpaceX modified the satellite software so the thrusters would produce
List of Falcon 9 and Falcon Heavy launches (2024)
List_of_Falcon_9_and_Falcon_Heavy_launches_(2024)
Transmission line in a long-distance communications network
network such as carrier systems, microwave radio relay links, geosynchronous satellite links, underground cables, aerial cables and open wire, and submarine
Long line (telecommunications)
Long_line_(telecommunications)
Name of various communications satellites
Early Bird Intelsat and subsequent satellites that travel in circular geostationary orbits. Due to its non-geosynchronous orbit, similar to a Molniya orbit
Telstar
Type of communications satellite
(12–16 GHz) HTS satellite projects, of which 3 had launched and 7 were in construction. Initially, HTS systems used satellites in the same geosynchronous orbit
High-throughput_satellite
Retired American expendable rocket
communications satellites, including Syncom-1 and Syncom-2. Syncom-1 was intended to be the first satellite to be placed into a geosynchronous orbit, however
Delta_B
American telecommunications company
data, voice, fax, telex and video capabilities via the Inmarsat geosynchronous satellite constellation through two earth station facilities in Southbury
COMSAT_Mobile_Communications
Day of the year
program: Explorer 4 is launched. 1963 – Syncom 2, the world's first geosynchronous satellite, is launched from Cape Canaveral on a Delta B booster. 1963 – An
July_26
Joint Australia–United States base near Alice Springs, Australia
electronic intelligence, which it had collected using two geosynchronous Orion satellites located over the Indian Ocean. In late 1966, during the Cold
Pine_Gap
American commercial communications satellite launched in 1965
catches the worm") was the first commercial communications satellite to be placed in geosynchronous orbit, on April 6, 1965. It was built by the Space and
Intelsat_I
Indian rocket engine
produced equivalents. It is used in the Polar Satellite Launch Vehicle (PSLV), Geosynchronous Satellite Launch Vehicle (GSLV) and LVM3 for space launch
Vikas_(rocket_engine)
US Space Force communications satellite system
cellular phone system to a military UHF SATCOM radio system using geosynchronous satellites in place of cell towers. By operating in the Ultra high frequency
Mobile_User_Objective_System
American electrical engineer
geostationary satellite", and "father of the communications satellite". He formed and led the team that designed and built the first geosynchronous communications
Harold Rosen (electrical engineer)
Harold_Rosen_(electrical_engineer)
Radio transmitter to locate people in distress
of the satellite, the LUT is able to calculate the location of the beacon. GEOSAR or Geosynchronous Earth Orbiting Search and Rescue Satellites As a GEOSAR
Emergency position-indicating radio beacon
Emergency_position-indicating_radio_beacon
2023 Indian satellite launch mission
NVS-01 This also marks the 15th time that Geosynchronous Satellite Launch Vehicle will be launching the Satellites. This Launch Vehicle is an 3 Stage Launch
GSLV-F12
its core stage since 1993. It is also used as a core stage in Geosynchronous Satellite Launch Vehicle MKII rocket. It is also the part of a variant of
S139_Booster
ISRO India research centre
India. The LPSC has developed indigenous cryogenic upper stage for Geosynchronous Satellite Launch Vehicle (GSLV) which was successfully test fired by ISRO
Liquid Propulsion Systems Centre
Liquid_Propulsion_Systems_Centre
Geosynchronous satellite of India
GSAT-7C (Geosynchronous satellite 7C) is a planned Indian military communication satellite for the Indian Air Force, as part of the GSAT series. On 23
GSAT-7C
Use of satellite signals for navigation or geo-spatial positioning
seven navigational satellites. Three of the satellites are placed in geostationary orbit (GEO) and the remaining four in geosynchronous orbit (GSO) to have
Satellite_navigation
Indian aerospace engineer
the Vikram Sarabhai Space Centre and the project director of the Geosynchronous Satellite Launch Vehicle Mark III launch vehicle in 2010. He was also the
S._Somanath
Indian communications satellite
satellite launched in January 2014. It replaced the GSAT-3 satellite, which was launched in 2004. GSAT-14 was launched by a Geosynchronous Satellite Launch
GSAT-14
"Development of "HICALI" – Ultra-high-speed optical satellite communication between a geosynchronous satellite and the ground" (PDF). NICT News. No. 466. pp
List of spaceflight launches in October–December 2026
List_of_spaceflight_launches_in_October–December_2026
Prime Minister of Nigeria from 1960 to 1966
2013). "How a satellite called Syncom changed the world". Los Angeles Times. Retrieved 25 August 2019. "World's First Geosynchronous Satellite Launched".
Abubakar_Tafawa_Balewa
Objects intentionally placed into orbit
platforms called satellite buses. The first standardized satellite bus design was the HS-333 geosynchronous (GEO) communication satellite launched in 1972
Satellite
Research station in Canada
latitude, a geosynchronous communications satellite, if due south, would require an antenna to be pointed nearly horizontally; satellites farther east
Eureka,_Nunavut
Defense satellite communications project
60-foot antenna. Its location was ideal for communicating with geosynchronous satellites over the Indian Ocean. The station was also geographically suited
Satellite_Control_Network
Range of radio frequencies from 1-2 GHz
(1900 MHz). NOAA cyclically broadcasts weather data from its two geosynchronous satellites on 1694.1 MHz. The aircraft L-band ranges from 960–1215 MHz. Aircraft
L_band
Type of mobile phone
U.S. operator using geosynchronous orbit Tiantong – Chinese GEO system for regional voice and messaging services LEO satellites orbit Earth every 70–100
Satellite_phone
Orbit around Earth between 160 and 2000 km
appear stationary above one location on the planet. Unlike geosynchronous satellites, satellites in low orbit have a small field of view and can only observe
Low_Earth_orbit
Technology development overview
Weather satellite lists List of GOES satellites List of NOAA satellites List of satellites in geostationary orbit List of satellites in geosynchronous orbit
Outline of artificial satellites
Outline_of_artificial_satellites
Indian Navy communications satellite
a second satellite, GSAT-7A for Indian Air Force on 19 December 2018 on its Geosynchronous Satellite Launch Vehicle (GSLV-F11). The satellite was launched
GSAT-7
Class of Indian partially reusable launch vehicles under development by ISRO
Government of India. 8 October 2025. Retrieved 19 October 2025. "LVM3(Geosynchronous Satellite Launch Vehicle Mk III)". ISRO. Retrieved 23 September 2024. "LVM3"
Next Generation Launch Vehicle
Next_Generation_Launch_Vehicle
Chinese satellite program
Alternatively named Tansuo satellites, Shiyan satellites occupy varying orbits including low Earth, polar Sun-synchronous, geosynchronous, and highly-elliptical
Shiyan_(satellite)
Series of American military communications satellites
AEHF of earlier Milstar satellites, which makes it much less vulnerable to attacks on ground stations. As a geosynchronous satellite over the equator, it
Advanced Extremely High Frequency
Advanced_Extremely_High_Frequency
Operator of US environmental satellite programs
generations of satellites are being developed to succeed the current polar orbiting and geosynchronous satellites: the Joint Polar Satellite System) and
National Environmental Satellite, Data, and Information Service
National_Environmental_Satellite,_Data,_and_Information_Service
US space force communication system
geostationary orbit. The system became operational in 1981. The fifth satellite reached geosynchronous orbit, but had severely limited utility due to damage to the
Fleet Satellite Communications System
Fleet_Satellite_Communications_System
Communications satellite
maneuvered into a geosynchronous orbit, and is now near 35° East and in an inclined orbit. AMC-14 is based on the Lockheed Martin A2100 satellite bus, and includes
AMC-14
Space research centre of the Indian Space Research Organisation
development agencies. Major programmes of VSSC include the PSLV, Geosynchronous Satellite Launch Vehicle, LVM3, Rohini sounding rocket series, Space Capsule
Vikram_Sarabhai_Space_Centre
American satellite used to study Soviet satellites
American reconnaissance satellite launched aboard Space Shuttle Atlantis in 1990 to study Soviet satellites in geosynchronous orbit. The government of
Prowler_(satellite)
Russian data relay system
lit. Ray) Satellite Data Relay Network (SDRN), also referred to as Altair and Gelios, is a series of geosynchronous Russian relay satellites, used to transmit
Luch_(satellite)
SpaceX satellite Internet constellation
February 2015, financial analysts questioned established geosynchronous orbit communications satellite fleet operators as to how they intended to respond to
Starlink
Family of geosynchronous satellites
The W series was a family of geosynchronous satellites operated by Eutelsat which provided various coverage and bandwidth options for consumer and business
W_series_(satellites)
American not-for-profit corporation
Research Laboratory's geosynchronous satellite Navigation Technology Satellite-3 will use MITRE's Global Navigation Satellite System Test Architecture
Mitre_Corporation
2022). "Falcon Heavy 'simply outstanding' on SpaceX's first launch to geosynchronous orbit". Spaceflight Now. Retrieved 2 November 2022. Krebs, Gunter (1
List of spaceflight launches in July–December 2022
List_of_spaceflight_launches_in_July–December_2022
American company
McCaw and others. ICO has pursued plans to build and launch a geosynchronous satellite to cover North America, supplemented by an ancillary terrestrial
Pendrell_Corporation
Load bearing cable connecting objects in space
detail about the idea of a tensile cable to be deployed from a geosynchronous satellite, downwards towards the ground, and upwards away, keeping the cable
Space_tether
Broadcasting of television using artificial satellites
Relay 1 satellite was the first satellite to transmit television signals from the US to Japan. The first geosynchronous communication satellite, Syncom
Satellite_television
Indian national space and aeronautics agency
orbit satellites, small payloads to GTO and hundreds of foreign satellites. Along with the PSLV flights, development of a new rocket, a Geosynchronous Satellite
ISRO
American inventor
then-Soviet Union. The system tapped into the Soviet Molniya non-geosynchronous satellite constellation, which carried Moscow television to the Far North
Ken_Schaffer
Spacecraft without people on board
Spaceflight portal Beacon mode service Geosynchronous satellite Human spaceflight List of passive satellites Timeline of Solar System exploration Asif
Uncrewed_spacecraft
Activity involving the observation and tracking of artificial satellites
that are used to calculate orbits of the satellites imaged.[citation needed] Because geosynchronous satellites move slowly relative to the viewer they
Satellite_watching
List of orbital rockets
PSLV-XL – Operational PSLV-DL – Operational PSLV-QL – Operational Geosynchronous Satellite Launch Vehicle (GSLV) GSLV Mark I – Retired GSLV Mark II – Operational
List of orbital launch systems
List_of_orbital_launch_systems
American satellite-based radio navigation service
different orbits, including 24 satellites in medium-circle orbits (covering the world), 3 satellites in inclined geosynchronous orbits (covering the Asia-Pacific
Global_Positioning_System
Indian communications satellite
at a longitude of 55 degrees east. The launch of GSAT-5P used a Geosynchronous Satellite Launch Vehicle Mk.I, serial number F06, and took place from the
GSAT-5P
Former U.S. telecommunications company
of satellites for domestic broadcast use and encouraged competition between different systems. In 1976, COMSAT deployed Marisat, three geosynchronous satellite
COMSAT
Indian space scientist (born 1939)
Mahendragiri for testing liquid stages of the Polar Satellite Launch Vehicle and the Geosynchronous Satellite Launch Vehicle. He is the founder director of
A._E._Muthunayagam
GEOSYNCHRONOUS SATELLITE
GEOSYNCHRONOUS SATELLITE
Girl/Female
American, Arabic, Christian, English, German, Indian, Latin, Muslim, Parsi, Sanskrit, Tamil
Voice; Call; Satellite Communication; Alive; Living Earth; Holy; Life
Girl/Female
Arabic, Indian, Kannada, Marathi, Muslim, Sindhi
A Star; Satellite
Boy/Male
Arabic, Hindu, Indian, Muslim, Sindhi, Tamil
The Moon; Satellite
Girl/Female
Muslim
Satellite, Star
Girl/Female
Indian
Satellite, Star
Girl/Female
Indian
Satellites
Girl/Female
Muslim
Satellite.
Girl/Female
Muslim
Satellites
GEOSYNCHRONOUS SATELLITE
GEOSYNCHRONOUS SATELLITE
Girl/Female
Hindu, Indian
Precious Possession
Girl/Female
Tamil
River, Great earth, Heaven and earth conjoined
Girl/Female
Indian
Excellent, Highest social standing, Tall, Towering
Boy/Male
Muslim
The old emperor of Yaman, A companion of prophet (Pbuh)
Boy/Male
Hindu, Indian
Midnight; Peaceful; Early Morning; Dawn
Boy/Male
German
Divine
Girl/Female
English
Girl.
Boy/Male
Tamil
Abhishrey | அபீஷà¯à®°à¯‡à®¯
Abhishrey the credit of good deed. the dawn of the good
Surname or Lastname
English
English : variant of Lavender.
Boy/Male
Indian, Punjabi, Sikh
Mighty Brave
GEOSYNCHRONOUS SATELLITE
GEOSYNCHRONOUS SATELLITE
GEOSYNCHRONOUS SATELLITE
GEOSYNCHRONOUS SATELLITE
GEOSYNCHRONOUS SATELLITE
n.
The passage of a smaller body across the disk of a larger, as of Venus across the sun's disk, or of a satellite or its shadow across the disk of its primary.
n.
The dissapearance of a celestail body, by passing either behind another, as in the occultation of a star, or into its shadow, as in the eclipse of a satellite; -- opposed to emersion.
n.
A little moon or satellite.
a.
Pertaining to, or consisting of, satellites.
n.
The motion of any body, as a planet or satellite, in a curved line or orbit, until it returns to the same point again, or to a point relatively the same; -- designated as the annual, anomalistic, nodical, sidereal, or tropical revolution, according as the point of return or completion has a fixed relation to the year, the anomaly, the nodes, the stars, or the tropics; as, the revolution of the earth about the sun; the revolution of the moon about the earth.
n.
A secondary planet which revolves about another planet; as, the moon is a satellite of the earth. See Solar system, under Solar.
n.
A satellite.
n.
An attendant attached to a prince or other powerful person; hence, an obsequious dependent.
n.
A sphere which is smaller than, and in its movements subject to, another; a satellite.
n.
The situation of a heavenly body with respect to another when in the part of the heavens directly opposite to it; especially, the position of a planet or satellite when its longitude differs from that of the sun 180¡; -- signified by the symbol /; as, / / /, opposition of Jupiter to the sun.
n.
One of the two points where the orbit of a planet, or comet, intersects the ecliptic, or the orbit of a satellite intersects the plane of the orbit of its primary.
n.
The celestial orb which revolves round the earth; the satellite of the earth; a secondary planet, whose light, borrowed from the sun, is reflected to the earth, and serves to dispel the darkness of night. The diameter of the moon is 2,160 miles, its mean distance from the earth is 240,000 miles, and its mass is one eightieth that of the earth. See Lunar month, under Month.
n.
An interception or obscuration of the light of the sun, moon, or other luminous body, by the intervention of some other body, either between it and the eye, or between the luminous body and that illuminated by it. A lunar eclipse is caused by the moon passing through the earth's shadow; a solar eclipse, by the moon coming between the sun and the observer. A satellite is eclipsed by entering the shadow of its primary. The obscuration of a planet or star by the moon or a planet, though of the nature of an eclipse, is called an occultation. The eclipse of a small portion of the sun by Mercury or Venus is called a transit of the planet.
n.
An ideal straight line joining the center of an attracting body with that of a body describing an orbit around it, as a line joining the sun and a planet or comet, or a planet and its satellite.
n.
The hiding of a heavenly body from sight by the intervention of some other of the heavenly bodies; -- applied especially to eclipses of stars and planets by the moon, and to the eclipses of satellites of planets by their primaries.
n.
A secondary planet, or satellite, revolving about any member of the solar system; as, the moons of Jupiter or Saturn.
n.
The conical shadow projected from a planet or satellite, on the side opposite to the sun, within which a spectator could see no portion of the sun's disk; -- used in contradistinction from penumbra. See Penumbra.
n.
One of the planets of the solar system, next in magnitude to Jupiter, but more remote from the sun. Its diameter is seventy thousand miles, its mean distance from the sun nearly eight hundred and eighty millions of miles, and its year, or periodical revolution round the sun, nearly twenty-nine years and a half. It is surrounded by a remarkable system of rings, and has eight satellites.
n.
An irregularity, or a deviation, in the motion of a planet or satellite from its uniform mean motion; the amount of such deviation.
a.
Situated near; accompanying; as, the satellite veins, those which accompany the arteries.