Satellite - Wikipedia
网页A satellite or artificial satellite[a] is an object, typically a spacecraft, placed into orbit around a celestial body. They have a variety of uses, including communication relay, weather forecasting, navigation (GPS), broadcasting, scientific research, and Earth observation.
Artificial satellites - Science Learning Hub
网页An artificial satellite is an object that people have made and launched into orbit using rockets. There are currently over 3,000 active satellites orbiting the Earth. The size, altitude and design of a satellite depend on its purpose.
Earth satellite | Definition & Facts | Britannica
网页2024年8月19日 · Earth satellite, artificial object launched into a temporary or permanent orbit around Earth. Spacecraft of this type may be either crewed or uncrewed, the latter being the most common. The idea of an artificial satellite in orbital flight was first suggested by Sir Isaac Newton in his book Philosophiae Naturalis Principia Mathematica (1687).
What is a satellite? - NASA
网页2018年9月5日 · A satellite is a body that orbits around another body in space. There are two different types of satellites – natural and man-made. Examples of natural satellites are the Earth and Moon. The Earth rotates around the …
What is a satellite? | Space
网页2022年1月17日 · Every usable artificial satellite — whether it's a human or robotic one — has four main parts to it: a power system (which could be solar or nuclear, for example), a way to control its ...
What Is a Satellite? | NASA Space Place – NASA Science for Kids
网页2024年9月17日 · The Short Answer: A satellite is anything that orbits a planet or a star. Earth is a satellite orbiting the Sun. The Moon is a satellite orbiting Earth. When you launch a spacecraft into orbit around Earth, that’s a satellite, too. This kind of satellite can help us learn about Earth and the universe.
Satellites - Space Foundation
网页2024年9月4日 · Satellites are used to study the many celestial bodies in the solar system. To date, artificial satellites have orbited many significant planets and moons in our solar system, as well as numerous smaller objects like dwarf planets, asteroids and comets.
人造卫星（环绕地球在空间轨道上运行的无人航天器）_百度百科
网页人造卫星（Artificial Satellite）：环绕地球在空间轨道上运行的无人航天器。 人造卫星基本按照天体力学规律绕地球运动，但因在不同的轨道上受非球形地球引力场、大气阻力、太阳引力、月球引力和光压的影响，实际运动情况非常复杂。
Satellites | National Air and Space Museum
网页A satellite is an object that is in orbit around an object in space of a larger size. Things such as the Earth's Moon or Pluto's Charon are natural satellites. Humans have also created artificial satellites—human-made machines and spacecraft in orbit around our Earth or other objects in our galaxy.
Artificial Satellite - an overview | ScienceDirect Topics
网页1998年9月22日 · An artificial satellite is a manmade object launched into space to orbit around a planet, used for various purposes such as communication, weather reports, and scientific exploration. From: Introduction to …
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