Friday , December 3 2021

How many satellites surrounding the Earth and how can they not collide? – BBC News


64 satellites on one mission.

The space program SpaceX of Spaceton is scheduled to begin in South Africa's billionaire Ellon Musk on Sunday after several reprogramming.

A historical launch since the Falcon 9 rocket The United States will receive a maximum number of satellites on a single mission.

64 satellite sharing They come from 34 different organizations from 17 different countries.

The devices have different dimensions and will perform various functions from improving communication with the internet to chasing pirates at sea.

But did you wonder how many satellites in space? Can anyone send them? And can they fight each other?

How many satellites are there?

The SpaceX Falcon 9 rocket is ready to launch its Es-hail-2 communications satellite for Qatar on November 15, 2018 at Kennedy Space Center in Florida, USA.
Millionaire Elon Musk's space company SpaceX launches 64 satellites in a single launch.

If you had to estimate the number of man-made satellites turning around the world, how many numbers would you say? Hundreds, thousands?

According to the Index of Objects Launched by the United Nations Office for Outdoors Office (English, UNOOSA); 4.921 orbiting orbits right now.

But not all of them are active.

David Barnhart, Director of the Center for Aerospace Engineering at the University of Southern California, Los Angeles, said: "There are approximately 2,600 satellites that are not working anymore, or are around 17,000" in space. Angeles, United States.

According to the United States Aerospace National Administration in February of this year, the expert refers to the space wreck that surrounds the Earth and exceeds 7,600 tons. (For NASA, English abbreviation)

Barnhart told BBC World, "It's all in orbit around 35,000 km (orbit trajectory) from a height of about 100km (low Earth orbit) around the world.

What is the size of a satellite?

Satellite in the world.
Satellites can weigh from a few kilos to tons.

If you think of a satellite, perhaps the first image that comes to mind is a gigantic device made of heavy materials with tons of weight.

But that's not all.

"Its size someone bread basket (for example, tens of centimeters and kilograms on each side) school bus Barnhart, dedicated to designing satellites, says (a few meters and thousands of pounds on each side).

What is the function of a satellite?

Not all satellites are dedicated to observing the Earth and getting images.

The orbit of satellites in the world fulfills many functions. Contact (mobile phone coverage and data transfer), observation World & # 39; from Navigation and positioning (This is the GPS system we all use) and space and planet work part of science"defines the specialist.

Satellites are not solely responsible for taking photographs of the Earth.

How does a satellite stay in orbit?

Satellites can be orbital around the planet because they are programmed at speeds that are fast enough to overcome gravity.

A rocket moves the satellite into space and places the satellite in its orbit when the specified location is reached.

The speed reached when leaving the rocket from the satellite is enough to keep the device in orbit for hundreds of years.It refers to the National Oceans Service and the National Service of Environmental Satellites, Data and Information, which are connected to the Atmosphere of the United States (Nesdis for abbreviations in English).

A satellite remains in orbit because of its speed and gravitational force on Earth. The closest to the world requires more speed to resist the force of gravity, explains the Nesds on their website.

And satellites carry their own fuel feeds, which are only used to change their trajectory or prevent collisions.

So the satellites could collide?

A person with a phone and GPS in hand
We have GPS thanks to satellites.

"Yes, it may crash, but not often. Although there may be a large number of satellites, the area may have a large & # 39; And they are often in orbits that don't cross each other or are intertwined, 'says the expert at the University of Southern California.

Bir It doesn't mean that this doesn't happen and won't happen, and the possibility of a collision with plans to load thousands of more satellites increases, gerçekleş he adds.

In February 2009, an American and a Russian collided in the space of two communication satellites. It is thought that these two man-made satellites accidentally collided, for the first time they announced the center of Nesdis.

Who controls the satellites?

Garbage spinning around the Earth.
The only thing that returns worldwide is not more than 4,000 satellites.

Satellites can be owned by organizations, companies, governments and individuals.

There are many arrangements that control the frequency at which the radio communication operates in orbit, and in what orbit it enters, to prevent interference.

Barnhart told BBC World, "According to the External Space Agreement (1967), each country has a sort of regulatory control of satellite launchers, in particular to prevent radio interference and prevent potential collisions."

For example, in the United States, private companies must obtain a federal license to work in space.

If you want to operate with a communication satellite, request a license from the Federal Communications Commission (FCC) or initiate a satellite area, you will need the permission of the Federal Aviation Administration (FAA).

Globally, the United Nations Office for Foreign Affairs (English, UNOOSA) is responsible for the implementation of UN policy on the field. Acts as the organizer of space law in the world.

Elon Musk
Elon Musk is the founder and owner of SpaceX, a proprietary company.

Can anyone send the satellite space?

"Yeah, it is possible for almost everyone today to send satellites to satellites. Even high school students have set up and launched programs to share their satellites with launch vehicles and various government agencies around the world, enc says Barnhart.

Commercial companies are launching satellites into space with investments that have nearly tripled in the last decade and reach billions of dollars.

, In the space industry, it is a very exciting period with many innovations not only in new satellites but also in its development. "an industry for satellites", which so far does not exist "service" Analyze Barnhart.

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