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Satcom 1
Satcom 1 was an American geostationary communications satellite launched by RCA on December 12, 1975, which became the main distribution platform for early American cable television.
Satellite
A satellite is a body that orbits another in space, either natural like the Moon or artificial; Sputnik 1, launched in 1957, was the first artificial satellite.
Satellite bus
A satellite bus is the underlying structure and support subsystems of a satellite, carrying the payload, the antennas, sensors, or transponders that perform the mission.
Satellite Catalog Number
The Satellite Catalog Number, also called the NORAD ID, is a sequential unique identifier assigned by US Space Command to every artificial object it tracks in Earth orbit.
Satellite constellation
A satellite constellation is a group of artificial satellites working together across multiple orbits, providing coverage, revisit rates, and resilience for navigation, communications, and Earth observation missions.
Satellite dish
A satellite dish, also known as a satellite antenna, is a parabolic reflector that collects radio signals from communications satellites, used for home television since 1980.
Satellite flare
A satellite flare is a brief brightening of a satellite when a flat surface mirrors sunlight directly at an observer, best known from the Iridium flares.
Satellite geodesy
Satellite geodesy is the branch of geodesy that uses tracked artificial satellites to determine positions on Earth, its gravity field, and its rotation, growing rapidly since 1956.
Satellite imagery
Satellite imagery is pictures of Earth built from radiation measured by sensors on orbiting spacecraft, with civilian imagery beginning with TIROS-1 in 1960 and including free Landsat archives, commercial sub-meter pictures, and radar satellites.
Satellite navigation
Satellite navigation, or sat nav, determines position, velocity, and time on Earth by timing radio signals from satellite constellations, the four global systems being GPS, GLONASS, Galileo, and BeiDou.
Satellite phone
A satellite phone, also called a satphone, is a mobile telephone connecting directly to orbiting satellites, enabling calls and texts from remote areas beyond all cellular coverage.
Satellite spectrum and orbital-slot regulation
Satellite spectrum and orbital-slot regulation is the international system, administered by the International Telecommunication Union, through which satellite frequencies and orbital positions are filed, coordinated, and recorded to prevent interference.
Satellite television
Satellite television, also called satellite TV or direct-to-home TV, delivers programming through communications satellites received by home dish antennas or earth stations feeding cable networks.
Satellite television in the United States
Satellite television in the United States is the delivery of TV programming to American homes and businesses by geostationary satellites, which grew into cable's principal competitor.
Satish Dhawan Space Centre
Satish Dhawan Space Centre, also known as SHAR (Sriharikota Range), is India's spaceport on Sriharikota island, Andhra Pradesh, and ISRO's launch base, operational since 1971.
Saturation diving
Saturation diving is a technique where divers live under pressure until their tissues saturate with inert gas, so decompression is taken once after days of deep work.
Saturn I
Saturn I, also known as Saturn C-1, was the first large American launch vehicle, a two-stage NASA rocket whose ten flights from 1961 to 1965 all succeeded.
Saturn IB
The Saturn IB was a two-stage NASA rocket, first flown in 1966, that tested the Apollo spacecraft in Earth orbit and later launched crews to Skylab.
Saturn V
The Saturn V, also known as the Saturn V rocket, was NASA's three-stage heavy-lift launch vehicle that sent Apollo crews to the Moon from 1969 to 1972.
SaxaVord Spaceport
SaxaVord Spaceport, formerly Shetland Space Centre, is a licensed vertical launch spaceport on the island of Unst, Shetland, the UK's first, licensed in December 2023.
Scaled Composites Stratolaunch
The Scaled Composites Stratolaunch, nicknamed Roc, is a twin-fuselage carrier aircraft with a record 385-foot wingspan, first flown in 2019 and now used to launch the Talon-A hypersonic vehicle.
Scaled Composites White Knight
The Scaled Composites White Knight, also known as White Knight One, is a jet-powered carrier aircraft built to launch SpaceShipOne, winning the 2004 Ansari X Prize.
Schiaparelli Entry, Descent and Landing Demonstrator Module (EDM)
Schiaparelli was the European Space Agency's entry, descent, and landing demonstrator module for the ExoMars 2016 mission, which crashed during its Mars landing on 19 October 2016.
Scientific research on the International Space Station
Scientific research on the International Space Station, also called ISS science, is research aboard the orbiting laboratory, spanning biology, human physiology, physical science, Earth and space science, and technology development.
SCORE (satellite)
SCORE, short for Signal Communication by Orbiting Relay Equipment, was an experimental United States communications satellite launched in December 1958, recognized as the first communications satellite.
Scott Carpenter
Scott Carpenter, born Malcolm Scott Carpenter, was an American naval aviator and Mercury Seven astronaut who became the second American to orbit Earth in 1962.
Scott Kelly (astronaut)
Scott Kelly, also known as Scott Joseph Kelly, is a retired American astronaut who set an American record with a 340-day stay aboard the International Space Station in 2015–2016.
Scout (rocket family)
Scout was an American small orbital launch vehicle flown for NASA from 1960 to 1994, and in February 1961 it became the first entirely solid-propellant rocket to reach orbit.
Sea Dragon (rocket)
Sea Dragon was a 1962 design study by Robert Truax at Aerojet-General, under NASA contract, for a two-stage, sea-launched super heavy-lift rocket; it was never built.
Sea Launch
Sea Launch was a commercial launch venture, founded in 1995 by US, Russian, Ukrainian, and Norwegian partners, that launched satellites from a floating platform on the Pacific equator.