Artificial Satellites

About 6 months at a time and in the Russian program 1 year
It depends on the mission actually. It can be weeks or months even a year! However, the problem is when astronauts goes back on Earth. Getting used to gravity again which would take a while depending on how long they stayed in space.
This will depend on how long the space mission is planned for.
It depends on how long their mission is. Normally ranging from 10 days up to a few months but not much longer than that because staying in an enviroment without gravity for too long can weaken the astronaut's muscles. It also depends on how much oxygen and food is taken into space with the space ship.

Satellites are in space not in countries.

When the soviets launched Sputnik, it caused America to freak out. They were worried that the satellite contained a weapon that would be fired at America. They also feared they were way behind in technology compared to the soviets.

It is a popular misconception that there is no gravity in space. In fact, the gravitational pull on astronauts in the International Space Station (ISS) is nearly the full amount (about 90%) of the gravitational pull on the surface of the earth. While in orbit around the earth, the ISS is free falling, and everything inside the ISS is also free falling. In true free fall you feel weightless, but there is still gravity that is causing you to fall.

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Imagine you are in an elevator and the cables snap, and the elevator starts falling. Disregarding air friction, you and everyone in the elevator will all fall at the same speed as the elevator. You will be able to "float" weightlessly inside the elevator, just as astronauts do inside the ISS.

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In the case of the elevator, we know eventually you will meet an untimely end when the elevator strikes the ground floor. But unlike the elevator, the ISS is also moving sideways at a very high speed, so as it falls downward, it also travels sideways, and so the ISS follows the path of a circle. The shape and size of this circle is such that the ISS never gets any closer to the earth, even though it is "falling". The ISS is free falling in an orbital path.

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To understand how the ISS is free falling, follow this mental experiment. Disregard air friction, and assume you have unlimited strength. Imagine throwing a baseball level to the ground - that is, you don't throw it up or down, but it is travelling parallel to the ground when it leaves your hand. We all know from experience the ball will travel a ways before falling to the ground. Now, throw it twice as hard. It will travel twice as far before hitting the ground. Now imagine being able to throw the baseball so hard that it lands 6000 miles (10,000 Km) away. But 6000 miles away is a quarter of the way around the spherical planet. So your ball did not go in a straight line - it was falling all the time it was in flight, but because the earth was curving away, the ball also travelled in a curved line while in free fell. Finally, imagine throwing the ball so hard that, as it fell downwards, the earth curved away at the same rate, and so the ball whizzed around the earth and hit you on the back of the head.

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We know that a ball cannot hit you on the back of the head, even if you could throw it that hard, because of air friction and obstacles in the way, like mountains. But at 250 miles up, there is (almost) no air friction, and no obstacles to prevent the ball from circling the earth. That is exactly what happens to the ISS - the rockets push (throw) the ISS so hard and so fast in a sideways direction that, as the ISS falls, the earth curves away from it at exactly the same rate, and so the ISS really does fall without actually getting closer to the earth.

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That is why when they make movies (like Apollo 13, directed by Ron Howard), they were able to duplicate true weightlessness. They put the actors in a set inside an jet airplane, and flew the airplane high up, cut the engines, and allowed the airplane, and everyone in it, to free fall for a while. During the airplane's free fall, everyone was weightless, exactly as if they were on the ISS.

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Indeed, we know from Newton's first law of motion that a body in motion moves at the same speed and in the same direction unless a force acts upon it. So we know that the ISS would go in a straight line, NOT in orbit, if no forces were acting upon it. But it does follow a circular orbit, and so we know for certain that that full force of gravity is still acting upon the ISS and all of its occupants.

It was the first human-made satellite, (launched from Russia on Oct. 4, 1957), to orbit the Earth. A space probe leaves the orbit of Earth and goes off into distant space. Sputnik only left Earth's orbit to burn up in the upper atmosphere on Jan. 4, 1958.

Sputnik 1, launched by the USSR (Russia) on October 4, 1957, was the first

artificial satellite to successfully achieve Earth orbit. There had been several

previous unsuccessful attempts by the USSR and the USA.

No

Sputnik was a series of early satellites sent up by Russia/ the Soviet Union. the second in the series, Sputnik 2 carried a dog into space.

But since Sputnik means something like travelling companion in Russian it seems quite likely that there are dogs with that name too.

People are confused that law and ethics are same things but they are different from each other. But they both maintaine moral values and keep preventing voilation. Law are written and aproved documents where as ethics also written words(most times) but they are not carrying legal status. Ethics helps a professional, practitioner and expert in following law.

In any trade there are code of conduct and law as well and what expert describe that both mend to be obeyed.

But unfortunately nobody following law in true manner. if the condition of law is that then expect whats the condition of ethics.

it is also defined as "the descipline with what is good and bad or right and wrong or moral duty and obligation....While the LAW is an assumption is often made that what is right is also what is legal and what is legal is also what is right....

The first artificial satellite was Sputnik I, launched by the Soviet Union on the 4th of October 1957

They were unmanned, although Sputnik 2 carried a dog into space.

There are two types of satellites that are located in a foxed spot over earth the first is reconnaissance satellites for observation of earth and usually used by the military.. The second is earth observation satellites and are intended for environmental monitoring

It was launched into an elliptical low earth orbit.

Interestingly enough the sattelites are doing their level best at falling from the sky. The whole idea is that at orbital velocity the objects move forward fast enough that they continously miss the Earth as they fall down.

In the ideal case satellites are in orbit. This means that they circle the Earth at a specific speed and a specific height. Because satellites aren't in Earth's atmosphere nothing slows them down. If they did slow down it would reduce the height they orbit at. If the height were reduced they would encounter thicker air which would slow them down more, which would lower their height more. This cycle would continue until they crashed.

In actuality the satellites do slow down very slowly because the air is not totally absent. Eventually all satellites will fall from the sky.

Sputnik with its puppy dog passenger( Laika ) was launched in October 1957, and remained in orbit until early 1958, when it reentered EarthÂ’s atmosphere and burned up

Sputnik 1 was in orbit for 3 months, completing 1440 orbits.

Sputnik 2, Laika's flight, was in orbit for 162 days. There were other missions, but these two, especially Sputnik 1, were the ones to capture the world's - especially the US'- attention.

The primary disadvantage of satellite based observations is that satellite data has been available only since mid-2002 and the retrieval of surface temperature requires an accurate adjustment for the variable microwave emissivity of various land surfaces.

about 350 miles is where the international space station is.

The vast majority of satellites are in geo-stationary orbits. This means, they travel around the Earth at the same speed that the Earth rotates - making them appear in the same place. One example is the GPS satellite network. Other satellites that actually orbit around the Earth, are at a different altitude - so they would (thoretically) never collide with a stationary one. Those that are orbiting, are placed in such a way, that they also avoid each other.

The altitude of (manmade) satelites assures minimal signal interference when sending/recieving transmission.

It also gives the device a "birds eye view", necessary for optimal data collection and transmission.

note: a satelite can be defined as anything with an orbit around another mass.

A satellite map shows if its gonna rain or something like that

IRS- Internal Revenue Service.

The International Space Station (ISS).

Russia is credited with the first man-made satellite. "Sputnik," a 183-pound, 22-inch sphere, was launched on October 4, 1957. Sputnik was not invented by any one person but was the result of a long collaboration of Russian scientists. Sputnik refers both to the satellite and the program for its launch.

The concept of the satellite was proposed by Isaac Newton. Arthur C Clarke is credited with the idea of the communications satellite.

Sergei Korolev is considered the father of the Soviet space program. He is the one who convinced Kruschev to permit the use of the original R5 ICBM to launch Sputnik into orbit. At the time, the American "Vanguard" rocket was designed to orbit a satellite weighing about 1.8 pounds. Sputnik weighed 183 pounds.

A few months later the Soviets launched Laika, a dog, into orbit, in a satellite that weighed half a ton. Sputnik itself was quite a shock, but this half ton capsule meant the soviets could easily drop a nuclear bomb anywhere on the earth in about 90 minutes. Kruschev also (falsely) bragged he could roll R1 rockets off his assembly line like they were kolbasa (sausages).

Korolev was such a valuable asset to the Soviets that they refused to allow him to wear a uniform or any of the medals he had been awarded. He had the Order of Lenin, Russia's highest medal, but was never permitted to wear it.

Sputnik was predominantly Korolev's idea.