Geosynchronous orbit? or Low Earth Orbit?
Objects such as moons or satellites that revolve around a planet are typically referred to as "natural satellites" or "moons." Artificial satellites placed in orbit around a planet are simply called "satellites."
Sputnik is a series of soviet satellites. These satellites are placed from 1957 year.
Some natural satellites were created there, but artificial satellites are placed there using rockets.
The first artificial satellite that had a particular purpose (other than just for scientific research) was the Echo satellite; a large mylar balloon placed in orbit to reflect radio signals back to the Earth. Now, satellites are used for all kinds of communications; TV, cell phones, overseas phone calls, internet and such; weather satellites that help to predict the weather and track storms, and reconnaissance satellites that take photos of the Earth. Oh; GPS satellites.
Satellites are placed into different orbits to serve various purposes like communication, weather monitoring, and scientific research. Each orbit has specific requirements, and therefore satellites need to move at different speeds and directions to fulfill their designated tasks. Collisions can occur due to the vast number of satellites in space and the complexities of orbital mechanics, making it impractical to have all satellites move at the same speed and direction.
The moon has no natural satellites. The moon is a satellite of the earth. The only satellites that orbit the moon are those that are placed there by people to study the moon.
Some experts argue that there should be a limit on the number of satellites to prevent overcrowding and the creation of orbital debris that hinders future space activities. Others believe that strict guidelines and regulations on satellite launches are sufficient to manage the space environment without a specific limit on the number of satellites.
The number of electrons in the outermost orbital.
because it is a noble gas and has completely filled orbital (s orbital)
The next electron would be placed in the next available lowest energy orbital according to the aufbau principle, Hund's rule, and the Pauli exclusion principle.
Satellites
Satellites placed 200 - 800 kilometers above Earth are typically used for Earth observation, communication, and scientific research. These satellites are considered low Earth orbit (LEO) satellites and offer advantages like lower latency for communication and higher resolution for imaging compared to satellites in higher orbits.