64 satellites in the same mission
Spencer's Aerospace Company plans to launch SpaceX in South African billionaire Alon Musk on Sunday after several reprogramming.
It is a historical launch from the Falcon 9 rocket US Will take the largest satellites in a missile mission.
64 satellites launching They come from 17 different countries from 34 different organizations.
The devices have different sizes and improve the communication of the Internet to pursue pirates in the sea, accomplishing various tasks.
But have you thought how many satellites are in space? Can anyone send them? And they can collide with each other?
How many satellites are there?
If you want to estimate the number of man-made satellites moving around the Earth, what number do you call? Hundreds of thousands?
According to the Object of Objects prepared by the United Nations Office for the Outer Space Affairs, in English (UNOSA) there 4,921 satellites orbit Currently
But not all are active.
David Levier, director of the Space Engineering Research Center at the University of Southern California in Los Angeles, said, "There are about 2,600 satellites that are not working but still in orbit and about 17,000 objects." Angels, United States
Expert in February this year, according to Aeronautics and National Administration of the United States states, Earth orbits orbits in Earth's orbit and it exceeds 7,600 tons. (For its abbreviation in NASA, English)
Bernhart told BBC World, "They are in orbit from orbit around 35,000 km (geological orbital) in orbit around 100 km (orbit of orbit) around the Earth."
What is the size of the satellite?
If you think about satellites, the first image that is likely to be made is made of heavyweight heavyweight material that weighs a ton.
But not all of them are like that.
"Its size changes One A bread basket (For example, centimeter ten on each side and some kilograms of weight) Until a school bus (Many meters on each side and thousands of kilos), "says Benhart, who is dedicated to designing the satellite.
What is the function of a satellite?
Not all satellites are devoted to observing the Earth and taking images.
"In the orbit of satellites around the Earth, there are many functions that include: Communication (Cell phone coverage and data transfer), Inspection From the earth, Navigation and Status (This is the GPS system we use), and Study the space and the planet As part of science", The expert describes.
How does the satellite live in orbit?
Satellites can rotate around the planet because they are programmed at speeds which are quick to remove gravity.
A rocket transmits the satellite into space, and once it reaches a defined location, it gives the satellite space in its orbit.
When it is separated from the rocket, the speed achieved by the satellite is enough to keep the device in orbit for hundreds of years, National Service for Environmental Satellites, Data and Information, (for its abbreviation in Nades, English), which relies on the national service of the ocean and the atmospheric United States.
The satellite is in orbit due to its speed and gravitational force on Earth. The one near the Earth needs more speed to resist the force of gravity, Nesdis has said on its website.
And satellites have their own fuel supply, which is used only to change orbit or to avoid collision.
So can satellites collide?
"Yes, they can crash, but it does not happen frequently. When it appears that there are many satellites, it is a space & # 39; big & # 39; , And generally put it in orbit that do not cross or interfere with each other, "says Southern Southern California expert.
"It does not mean that it does not happen and can not be done, and the possibility of potential collision will increase with the plan to install thousands of satellites".
In February 2009, two communications satellites, one American and one Russian, collided with space. It is believed that this was the first time that the satellites made by two men had collapsed accidentally, Nessis describes the center.
Who controls the satellites?
Satellites can be owned by institutions, companies, governments and individuals.
To avoid interference, there are many rules for controlling how much radio communication is transmitting orbital and controlling which orbit.
According to the Outer Space Treaty (1967), each country includes certain types of regulatory controls, especially to avoid the interference of the radio and to help in the prevention of potential collisions during launch. " Bernhart told BBC World.
In the United States, for example, private companies must obtain a federal license to operate in space.
If you want to operate with a communications satellite, you must request a Federal Communications Commission (FCC) license or if you want to start a satellite location, you need the Federal Aviation Administration (FAA) permission.
And in terms of globally, the United Nations Office for Outreach Space Affairs (in English, UNOSA) is responsible for implementing space-related UN policies, so that Works as a regulator of the Scope Law in the world.
Can someone send a satellite location?
"Yes, Today it is possible that satellites can be sent to almost any space. Bernhart says that high school students have also shared their own satellites with launch vehicles and programs with various government agencies around the world.
Commercial companies are launching satellites in space, which has tripled in the past 10 years, in which investment has reached millions of dollars.
"It's a very exciting time in the space industry, with many innovations, not only in new satellites, but also in development The & # 39; Service & # 39; An industry for satellites, which did not exist yet ", Bernhart's analysis
Now you can get notifications from BBC News World. Download our application and activate it to not miss our best content.