Wheather satellites are used to take close pictures of the earth . Communication satellites are used for communication. Ex(in the old days if you sent a letter from Canada to Russia it would take 25 days. Now you write in MSN, it goes to the satellite and to the reciever.)
There are no known satellites of Mercury.
Triangulation of satellites requires three satellites that bank of one another simultaneously.
Yes but they are called natural satellites
CORRECT ANSWER:No.
Old satellites that are in orbit and still powered continue to perform their function. Old satellites that have no power and are still in orbit have no use. Those that fall from orbit have no use as the are destroyed on reentry. Old satellites that have never been launched could be used as museum exhibits.
The term "satellites" comes from the Latin satelles("attendants", members of a retinue), by way of the Old French for "hirelings". Natural satellites are followers, or "hangers-on" to a planet in its orbit.
Old satellites either remain in orbit as space debris, eventually falling back to Earth and burning up in the atmosphere, or are intentionally deorbited and moved to a "graveyard" orbit to reduce the risk of collision with operational satellites. Some may also be repositioned for alternative uses or repurposed for different missions.
There are thousands of satellites currently orbiting the Earth. The exact number can vary, as new satellites are launched and old ones are decommissioned regularly.
Jupiter, Saturn and Uranus have MORE that 21 satellites.No planet has just 21 satellites - unless your are reading from a very old text book.
Wheather satellites are used to take close pictures of the earth . Communication satellites are used for communication. Ex(in the old days if you sent a letter from Canada to Russia it would take 25 days. Now you write in MSN, it goes to the satellite and to the reciever.)
you can see a shadow on the planet and its so cool
Old satellites are brought back from space to avoid them becoming space debris that poses a risk of colliding with other operational satellites or spacecraft. By safely deorbiting and disposing of old satellites, it helps in reducing the amount of space debris in orbit around the Earth.
The five types of artificial satellites are communication satellites, navigation satellites, weather satellites, Earth observation satellites, and scientific research satellites.
The old Soviet Union. first with satellites, then with manned spaceflight.
There are no known satellites of Mercury.
Mercury has no satellites.