Quote: "A satellite or artificial satellite is an object intentionally placed into orbit around a celestial body."
Artificial objects placed into orbit around the Earth for various purposes, including communication, scientific research, and military surveillance.
Orbital Mechanics: The study of the motion of objects in orbit around the Earth, including Kepler's laws and other principles.
Launch Vehicles: The types of rockets and spacecraft used to get objects into orbit, including their design, operation, and challenges.
Satellite Subsystems: The various components of a satellite, including power, propulsion, communications, and other systems.
Types of Satellites: The different types of satellites used for various purposes, including communication, remote sensing, scientific research, and more.
Ground Stations: The facilities on the Earth that are used to communicate with and control satellites.
Satellite Operations: The processes involved in deploying, maintaining, and controlling satellites once they are in orbit.
Satellite Applications: The various uses of satellites, including remote sensing, navigation, communication, weather forecasting, and more.
Space Environment: The conditions in outer space that satellites must endure, including radiation and micrometeoroids.
Space Debris: The problem of space debris and its impact on satellite operations and safety.
International Cooperation: The role of international organizations and agreements in governing the use of satellites and related technologies.
Future of Space Technology: Trends in satellite technology and their potential impact on space exploration and human activities on Earth.
Communication satellites: These satellite networks enable voice and data transfer from one place to another through a range of devices like mobile phones, radios, and television sets.
Navigation satellites: GPS, Galileo, and Glonass are the few examples of navigation satellites. These satellites help in providing location as well as directional information.
Imaging or remote sensing satellites: These satellites capture images of the earth's surface from space. The captured images are used for mapping, measuring pollution levels, and monitoring crops.
Weather Satellites: These satellites help forecast weather conditions by collecting data on the ocean temperature, atmospheric pressure, and wind speed.
Military Satellites: These satellites provide communication, navigation intelligence, and reconnaissance support to military operations.
Scientific Satellites: These satellites are used for research purposes and exploring the universe.
Earth Observation Satellites: These satellites are designed for observing the earth's surface and atmospheric conditions.
Geostationary Satellites: These satellites are positioned at a fixed point relative to the earth's surface, making it appear stationary. They are mainly used for communication purposes.
Low Earth Orbit (LEO) Satellites: These satellites orbit the earth at a low altitude, enabling them to capture high-resolution images of the earth.
Polar Orbiting Satellites: These satellites are used for environmental and weather observation. They orbit the earth from pole to pole, and their sensors scan the earth's surface at different angles.
Quote: "Satellites have a variety of uses, including communication relay, weather forecasting, navigation (GPS), broadcasting, scientific research, and Earth observation."
Quote: "Most satellites have an electricity generation system for equipment on board, such as solar panels or radioisotope thermoelectric generators (RTGs)."
Quote: "Most satellites also have a method of communication to ground stations, called transponders."
Quote: "Many satellites use a standardized bus to save cost and work, the most popular of which is a small CubeSats."
Quote: "Most communication satellites are radio relay stations in orbit."
Quote: "As of 2018, about 90% of the satellites orbiting the Earth are in low Earth orbit or geostationary orbit."
Quote: "Some imaging satellites chose a Sun-synchronous orbit because they can scan the entire globe with similar lighting."
Quote: "As the number of satellites and space debris around Earth increases, the threat of collision has become more severe."
Quote: "Earth observation satellites gather information for reconnaissance, mapping, monitoring the weather, ocean, forest, etc."
Quote: "Space telescopes take advantage of outer space's near perfect vacuum to observe objects with the entire electromagnetic spectrum."
Quote: "Because satellites can see a large portion of the Earth at once, communications satellites can relay information to remote places."
Quote: "The signal delay from satellites and their orbit's predictability are used in satellite navigation systems, such as GPS."
Quote: "Space probes are satellites designed for robotic space exploration outside of Earth."
Quote: "The first artificial satellite launched into the Earth's orbit was the Soviet Union's Sputnik 1, on 4 October 1957."
Quote: "As of 31 December 2022, there are 6,718 operational satellites in the Earth's orbit."
Quote: "Of which 4,529 belong to the United States (3,996 commercial)."
Quote: "590 belong to China."
Quote: "174 belong to Russia."
Quote: "1,425 belong to other nations."