Question

What are satellites ? ​

Answer 1

Answer:

an artificial body placed in orbit round the earth or moon or another planet in order to collect information or for communication.

Answer 2

Explanation:

QUESTIONS:-

What are satellites ?

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In astronomy, a satellite is an object that orbits (goes around) a planet. There are several hundred natural satellites, or moons, in our Solar System.

What are the 3 types of satellites?

• Common types include military and civilian Earth observation satellites, communications satellites, navigation satellites, weather satellites, and space telescopes. Space stations and human spacecraft in orbit are also satellites.

• On 4 October 1957 the Soviet Union launched the world's first artificial satellite, Sputnik 1. Since then, about 8,900 satellites from more than 40 countries have been launched. According to a 2018 estimate, some 5,000 remain in orbit.

• Of those, about 1,900 were operational, while the rest have exceeded their useful lives and become space debris.

• Approximately 63% of operational satellites are in low Earth orbit, 6% are in medium-Earth orbit (at 20,000 km), 29% are in geostationary orbit (at 36,000 km) and the remaining 2% are in various elliptical orbits.

• In terms of countries with the most satellites, the USA has the most with 859 satellites, China is second with 250, and Russia third with 146. These are then followed by India (118), Japan (72) and the UK (52).

• A few large space stations, including the International Space Station, have been launched in parts and assembled in orbit.

• Over a dozen space probes have been placed into orbit around other bodies and become artificial satellites of the Moon, Mercury, Venus, Mars, Jupiter, Saturn, a few asteroids, a comet and the Sun.