Artificial Satellites

A large artificial satellite in which people can live for long periods is known as a space station. Space stations are designed to support human life in the harsh environment of space by providing living quarters, workspaces, and facilities for research and experimentation. Examples of space stations include the International Space Station (ISS) and the planned Chinese Space Station.

To input an address into a GPS satellite system, access the maps or navigation app on the device and select the option to enter a destination address. Then, type in the full address including street name, number, city, and state, and follow the prompts to set it as your destination for directions.

USGS stands for United States Geological Survey. They are a scientific agency of the United States government that conducts research and provides unbiased information about the geology, natural hazards, and resources of the United States. This includes monitoring earthquakes, volcanoes, and water resources, as well as mapping and studying the landscape.

The further away from the planet a satellite is, the longer the orbit. So satellites in low earth orbit - from about 120 to about 600 miles up - orbit the Earth in about 90 to 100 minutes, doing 15-18 orbits per day. The International Space Station, for example, is about 150 miles up, and appears to ZIP across the sky. The Space Shuttle can get up to "LEO" or "low Earth orbit".

Higher orbits take longer. One of the most useful orbits is about 22,500 miles up, so that the satellite takes 24 hours to go around the Earth one time. The means that the satellite is orbiting the Earth at the same speed that the Earth itself is turning, so that the satellite appears to remain in the same place all the time. This is called "geo-synchronous" from the Latin words for "Earth" and "same time". Communications satellites and TV satellites are commonly in "geosych" orbits. The Shuttle cannot make it to geosynch altitude, for lack of fuel. So comsats headed to geosynch orbits are launched from the Shuttle with special booster rockets, or are launched from unmanned "heavy lift" rockets.

Please be a little more precise in your meaning when you say "cover" the Earth. For radio or TV communications, three satellites in geosynchronous orbit will be visible from any inhabitable locale on the planet. (The polar regions aren't really "inhabitable", and aren't visible from GEO. )

For navigational purposes, more are required. The GPS system requires line-of-site to FOUR satellites at one time in order to give a good "fix" of your position; the USAF uses 27 satellites to accomplish this, anywhere on the Earth.

Left all alone, any man-made satellite with any part of its orbit within a couple hundred miles of the surface will eventually drop out of orbit and burn up in the atmosphere, because it gradually loses energy plowing through the tenuous atmosphere even at that altitude. The International Space Station, at about 240 miles above the surface, loses several miles of orbital altitude every month, and has to have a bump from its onboard thrusters to restore the desired orbit. The process can be hastened with a bump from onboard thrusters that's timed just right so as to reduce the minimum point of the orbit to a low altitude, well into a more dense portion of the atmosphere. The atmosphere itself then does the rest of the job, robbing the satellite of so much kinetic energy that it can no longer maintain orbit. Technically, there's another answer to the question: If the satellite is boosted into a state of higher energy, so that it assumes a solar orbit, or leaves the solar system entirely, that maneuver would also be considered as having removed the satellite from earth orbit.

The term used to describe a large natural satellite of any planet is a "moon."

Yes, Kepler's laws of planetary motion were influential in planning the orbits of artificial satellites around Earth. These laws helped in determining the shape, size, and orientation of satellite orbits to ensure stability and efficiency in space operations. By applying Kepler's laws, engineers can optimize satellite trajectories for specific missions and applications.

Here is an answer that might seem childish or facetious at first, but I've had some good luck

getting the idea across with this explanation, and I urge you to try it out.

You have several baseballs, and you're going to exercise your pitching power. One at a time,

you'll take each baseball, throw it perfectly horizontally, and see how far it goes before it hits

the ground.

You toss the first ball easily, and it hits the ground a few meters in front of you.

You toss the next one with more speed, and it goes a few meters farther than the first one went.

You toss the next one with even more speed, and it goes even farther before it hits the ground.

The faster the ball leaves your hand, the farther it goes before it meets the surface. Gravity takes

some time to pull it down, and the faster it goes horizontally, the farther it can go during that time.

Now, remember that the earth isn't flat. It's a sphere. If you start out horizontally and keep going

in a straight line, the sphere (earth) curves down and away from you.

Same is true for the baseball ... You throw it horizontally. As it flies away from you, gravity pulls it

down, always toward the center of the earth. But because the earth is a sphere, the earth's surface

also curves down from level, as the level gets farther from you.

If you throw the baseball fast enough, the earth curves down and away from it just as fast as gravity

pulls it toward the center of the earth. So it keeps falling, but the surface falls away just as fast ! The

baseball never falls fast enough to hit the ground, because gravity doesn't pull it down hard enough.

It just keeps falling all the way around the earth, never catching the ground.

If the ball it has to plow through the air, then it loses its sideways speed, and eventually it does fall

to the ground. That's why there are no artificial satellites that just barely skim the ground ... they

have to stay out of the atmosphere, or else they'll run out of steam. But on the moon, where there's

no air to slow down an artificial satellite, it can stay in an orbit that's just high enough to clear the

mountain tops.

Advantages; they always appear to be in the same spot in the sky, so you can focus your satellite dish antenna on them.

Disadvantages; they are quite high, about 23,000 miles up. You need a fairly strong signal to hit them, and a handheld device often doesn't have enough power.

There are hundreds of thousands pieces of man-made material currently in orbit. A few thousand of them are actual useful satellites, things that we want to have up there; stuff like GPS satellites, communications satellites, weather observation stations, the International Space Station, and of course, DirecTV satellites.

Most of them are "space junk"; satellites that have failed, or broken, or out of fuel. Old booster rocket engines. Collision debris, from when the Chinese shot down a satellite and smashed it into 100,000 pieces of litter in orbit, or when one of the Iridium satellites crashed into a Russian reconnaissance bird.

24 active, but there are spares on standby.

ISRO, the Indian Space Research Organisation, was founded on August 15, 1969.

Satellites such as INSAT-4B, Gsat-10, Gsat-15, and GSAT-11 are known to orbit over Mumbai to provide various communication and broadcasting services. Additionally, other satellites from international organizations like NASA and ESA may also have orbits passing over Mumbai for various purposes such as earth observation and scientific research.

France is a part of the European Space Agency and participates in launches by this agency along with other member nations.

The French government has launched 4 reconnaissance satellites: Hélios 1B, Helios 2A, Cerise, and Clementine

In 1929, Russian scientist Konstantin Tsiolkovsky predicted that artificial satellites would one day be able to orbit the Earth. This idea eventually became reality with the launch of the first artificial satellite, Sputnik 1, in 1957.

GPS satellites are used to help us accurately determine the current time and our location. GPS satellites are not directly used to help us predict the weather.

Weather satellites use many imaging and sensing technologies to help us predict the weather, but they are not useful in helping us determine our location.

They are two different types of satellites with two different purposes.

There are many other types of satellites too, such as communication satellites (such as used with Direct TV), space telescopes (such as Hubble) etc.

GRAVITY!!!!

Weather can impact transportation and travel, influence outdoor activities, and affect agriculture and crop production. Severe weather events like hurricanes, tornadoes, and blizzards can also cause property damage and threaten public safety.

It most likely would not be the Earth's gravitational pull. More like the meteor was already shooting towards the Earth or near it enough to head to us. In that case, the Earth's gravity plus the meteor's speed minus the inverse force of the atmosphere equal if it would come down or not. Other than all of that, the poles of the Earth's magnetic force is what pulls meteors in, not the gravity, although it does help. :/

That's true if the orbit is perfectly circular ... which it never is.

In an elliptical orbit, I think you'd have to say that it's falling faster than the

central body's curvature when it's farther out, and slower than the central

body's curvature when it's closer in. (Think of the extreme elongated solar

orbit of a repeating comet.)

But on an intuitive level, the way you stated it is a good description.

Notes: Actually some satellites do have orbits which are described as "circular orbits".

Others have "elliptical orbits".

Of course the Earth isn't perfectly spherical either.

Incidentally, "rate of falling" and "rate of curving" are not really equivalent terms. I guess we know what you mean though.

Gravity keeps satellites in orbit. The closer you are to the Earth, the faster you have to go to maintain your orbit.

At low Earth orbit, the altitude of the Space Station, you make an orbit every 90 minutes. At the Moon's distance you need over 27 days to go around the Earth.

In-between there is an altitude which matches the rate of the Earth's rotation. Many satellites orbit at this altitude.

In a circular orbit with negligible air resistance, the main forces acting on a satellite are the gravitational force pulling it towards the Earth's center, and the centripetal force keeping it in its circular path. These two forces are balanced, allowing the satellite to maintain a stable orbit.

Re = Radius of earth (6.38EE6)

H = Height of satellite (780km => 780,000m)

Me = Mass of earth (5.98EE24)

Ms = Mass of satellite

G = Universal Gravity (6.67EE-11)

V = Orbital Speed

Fg= Force of gravity

Fc= Centripetal force

Use the formula Fg=Fc

(((G)(Me)(Ms))/ (Re+H)^2)= (Ms)(V^2)/(Re+H)

Ms cancel out

((G*Me)/ ((Re+H)^2)) = (V^2)/(Re+H)

Solve for V

V = sqrt( ((G*Me)/((Re+H)^2)) * (Re+H) )

= sqrt( ((6.73EE-11*5.98EE24)/((6.38EE6+780,000)^2)) * (6.38EE6+780,000) )

= 7465.426831 m/s