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sputnik
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What happens in the exosphere layer?
This is a large band of the atmosphere above the Mesosphere and below the Exosphere. Temperatures can be quite high here, up to 1500'C. Satellites, including the International Space Station, orbit the earth in this region. Although there is not much gas this high, there is still a small amount that can cause some drag on these low orbit satellites, so they need a boost every now and then to keep in orbit. Aurora's (northern or southern lights) also occur here.
Where do satellites fly?
Man-made satellites are either in low, medium or high earth orbits, depending on their function. The closest ones, including the International space station, are in a low earth orbit, up to a height of 2000 km. The International Space Station orbits at a height of around 340km, while the Hubble Telescope is around 595km. The advantage of these is that less energy is required to get there, but the disadvantage is that their orbits may decay over time, since there is some drag on the atmospheric gas still at these heights - so these may need a 'boost' every now and then to maintain their orbits. At higher altitudes, satellites will orbit more slowly, taking longer to make one orbit. The medium Earth orbit extends to 35,786km above the Earths surface, from here the high earth orbit begins. At this point, the time taken for a satellite to orbit once around the earth is 24 hours, the same as one day. 35,786km is a special orbit for Geo-stationary satellites. Since they orbit the earth in the same time that it takes the earth to spin once on its axis, it means that the satellite can stay in roughly the same spot over the earth.
Why don't satellites crash into earth?
Well, they do eventually, when they're done doing their jobs. If defunct satellites don't burn up on their way down, they usually land in the ocean or somewhere else away from civilization. As for why that doesn't happen immediately, it's science, baby. Satellites are launched into space by rockets, and even though the force of gravity pulls on them, the initial velocity from the rocket is enough to counteract gravity's pull. The closer the satellite is to Earth, the faster it needs to go to stay in orbit. Sometimes they need to change orbit to avoid bumping into another satellite or other space debris, but once they're out there, satellites can stay in orbit for hundreds of years.
How do you use the word orbit in a sentence?
An orbit is the pathway that an object follows around a center. Planets orbit their sun, and electrons orbit the nucleus of the atom. Here are some more sentences.The comet traveled through the planet's orbit and almost hit a moon.The asteroid fell from orbit and was pulled into the sun.Her friends orbit her as if she were their sun.The planets orbit the sun.There are hundreds of satellites in orbit around our planet. Orbit is the brand name of a chewing gum in the UK. I wonder what it would be like to pilot a space craft and orbit the Earth It takes 27 days 7 hours 43 minutes for the Moon to orbit the Earth once.
When did the Galileo spacecraft come back to Earth?
Depends entirely on which satellite of Jupiter you are referring to - they all have different rotation times. And with over 60 satellites, there is no room to catalog the orbital period of all of them here.
Can moons be satellites?
Yes. "Moons" are _natural_ satellites, as opposed to the artificial satellites that we build here on Earth and launch into space on rockets.
How does an artificial satellite stay in orbit once correctly placed above Mars?
They usually get their energy from the Sun, but they may also have a nuclear reactor. That's how they get their energy; how they work in detail would depend on what they are supposed to do. There are satellites for many different purposes.
What are the names of the earths satellites?
Earth has only one natural satellite and that is the moon. There are however over 13,000 artificial satellites, and the most widely recognized is the International Space Station (ISS). There are lots of programs and websites where you can see the names and locations of all these satellites, there are just too many to list here - search WIKIPEDIA for List of Earth observation satellites.
What does the exosphere do for earth?
Nothing. It has been recorded that gases are kept in a layer before trailing off into space, and this area was dubbed the exosphere. Some satellites orbit here.
How do satellites move in orbit?
Satellite orbit the Earth at different altitudes. A good overview of Low Earth Orbit, Medium Earth Orbit and Geostationary Orbit can be found here: http://www.idirect.net/Company/Satellite-Basics/How-Satellite-Works.aspx
What happens in the exosphere layer?
This is a large band of the atmosphere above the Mesosphere and below the Exosphere. Temperatures can be quite high here, up to 1500'C. Satellites, including the International Space Station, orbit the earth in this region. Although there is not much gas this high, there is still a small amount that can cause some drag on these low orbit satellites, so they need a boost every now and then to keep in orbit. Aurora's (northern or southern lights) also occur here.
Where do satellites fly?
Man-made satellites are either in low, medium or high earth orbits, depending on their function. The closest ones, including the International space station, are in a low earth orbit, up to a height of 2000 km. The International Space Station orbits at a height of around 340km, while the Hubble Telescope is around 595km. The advantage of these is that less energy is required to get there, but the disadvantage is that their orbits may decay over time, since there is some drag on the atmospheric gas still at these heights - so these may need a 'boost' every now and then to maintain their orbits. At higher altitudes, satellites will orbit more slowly, taking longer to make one orbit. The medium Earth orbit extends to 35,786km above the Earths surface, from here the high earth orbit begins. At this point, the time taken for a satellite to orbit once around the earth is 24 hours, the same as one day. 35,786km is a special orbit for Geo-stationary satellites. Since they orbit the earth in the same time that it takes the earth to spin once on its axis, it means that the satellite can stay in roughly the same spot over the earth.
Why don't satellites crash into earth?
Well, they do eventually, when they're done doing their jobs. If defunct satellites don't burn up on their way down, they usually land in the ocean or somewhere else away from civilization. As for why that doesn't happen immediately, it's science, baby. Satellites are launched into space by rockets, and even though the force of gravity pulls on them, the initial velocity from the rocket is enough to counteract gravity's pull. The closer the satellite is to Earth, the faster it needs to go to stay in orbit. Sometimes they need to change orbit to avoid bumping into another satellite or other space debris, but once they're out there, satellites can stay in orbit for hundreds of years.
How do you use the word orbit in a sentence?
An orbit is the pathway that an object follows around a center. Planets orbit their sun, and electrons orbit the nucleus of the atom. Here are some more sentences.The comet traveled through the planet's orbit and almost hit a moon.The asteroid fell from orbit and was pulled into the sun.Her friends orbit her as if she were their sun.The planets orbit the sun.There are hundreds of satellites in orbit around our planet. Orbit is the brand name of a chewing gum in the UK. I wonder what it would be like to pilot a space craft and orbit the Earth It takes 27 days 7 hours 43 minutes for the Moon to orbit the Earth once.
Earth sattelite is a gravity free system.explain with reason?
It seems there might be a misconception. Satellites orbiting Earth are not in a completely gravity-free environment. They experience a gravitational force from Earth, which is what keeps them in orbit. However, they are in a state of continuous free fall, which creates the sensation of weightlessness for astronauts inside. This is often referred to as microgravity. So, while they are not gravity-free, the effects of gravity are significantly reduced compared to objects on the Earth's surface.
What would happen if the Earth stoped moving and there were still satellites in orbit around it?
We'd have a serious problem with the moon. If it was on the "going" side of the earth, that is, if the moon was in orbit in the direction the earth was moving, it would keep going. There would be a serious pull from the earth, and there would be a curve in the path of the moon as it left the vicinity of the earth, but it would be headed out into space. If the moon was on the other side, it would plow into us. Game over. If the moon was on either "side" of its orbit, it would still escape earth. It's too massive not to, and it has too much kinetic energy to stay here if the earth stopped cold. Orbiting satellites would take the same kind of hit. They're a lot less massive than the moon, but they're a heck of a lot less closer. Satellites would leave orbit and move off into space, change orbital height according to how much mass they have and exactly where they were in their orbits, or would return to earth and burn up or crash. There is a good sized set of variables there. Individual calculations would have to be made for each satellite. It's mass and in particular its location in its orbit are critical. Remember some satellites are in polar orbit. We'd lose some of them, and other would crash into the planet. There are many satellites up there, and a every orbit you can imagine probably has a bird or three in it. Make some simple drawings and think it through. You'll get a handle on it in short order.
What are the two different types of satellites?
There are nine types of artificial satellites. Here is the list: Astronomical satellites, Biosatellites satellites, Communication satellites, Miniaturized Satellites, Navigational satellites, Reconnaissance satellites, Earth observation satellites, Space stations, and Weather satellites.
