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#1
September 10th 03, 12:44 AM
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satellites...
Hello
I m a 12 years old boy how many satellites are there on this earth ? thank you. 
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#2
September 12th 03, 11:04 AM
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satellites...
"Gabriel Hétet" wrote:
Hello I m a 12 years old boy how many satellites are there on this earth ? thank you. I depends how you define satellites. Here are some guestimates Fully functioning sats in low earth orbit (400 - 2000 km up)? Probably only a few hundred. Fully functioning sats in geosynchronous orbit? Probably hundreds. All bits of junk around the Earth (dead satellites, spent rocket bodies, various bits of debris big enough to be tracked and classified, etc)? Nearly 28,000. Have a look at http://www.heavens-above.com/ -- Larry Brash
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#3
September 12th 03, 11:04 AM
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satellites...
"Gabriel Hétet" wrote:
Hello I m a 12 years old boy how many satellites are there on this earth ? thank you. I depends how you define satellites. Here are some guestimates Fully functioning sats in low earth orbit (400 - 2000 km up)? Probably only a few hundred. Fully functioning sats in geosynchronous orbit? Probably hundreds. All bits of junk around the Earth (dead satellites, spent rocket bodies, various bits of debris big enough to be tracked and classified, etc)? Nearly 28,000. Have a look at http://www.heavens-above.com/ -- Larry Brash
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#4
September 12th 03, 01:20 PM
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satellites...
"Larry Brash" wrote in message ... "Gabriel Hétet" wrote: Hello I m a 12 years old boy how many satellites are there on this earth ? thank you. I depends how you define satellites. Here are some guestimates Fully functioning sats in low earth orbit (400 - 2000 km up)? Probably only a few hundred. Fully functioning sats in geosynchronous orbit? Probably hundreds. All bits of junk around the Earth (dead satellites, spent rocket bodies, various bits of debris big enough to be tracked and classified, etc)? Nearly 28,000. Most of which have decayed (fallen back to Earth), leaving about 9,000 still in orbit. Ted Molczan
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#5
September 12th 03, 01:20 PM
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satellites...
"Larry Brash" wrote in message ... "Gabriel Hétet" wrote: Hello I m a 12 years old boy how many satellites are there on this earth ? thank you. I depends how you define satellites. Here are some guestimates Fully functioning sats in low earth orbit (400 - 2000 km up)? Probably only a few hundred. Fully functioning sats in geosynchronous orbit? Probably hundreds. All bits of junk around the Earth (dead satellites, spent rocket bodies, various bits of debris big enough to be tracked and classified, etc)? Nearly 28,000. Most of which have decayed (fallen back to Earth), leaving about 9,000 still in orbit. Ted Molczan
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#6
September 13th 03, 03:14 AM
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satellites...
On Wed, 10 Sep 2003 01:44:52 +0200, "Gabriel Hétet"
wrote: Hello I m a 12 years old boy how many satellites are there on this earth ? thank you. http://liftoff.msfc.nasa.gov/RealTim.../JTrack3D.html This is a NASA site cool stuff! scambron
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#7
September 13th 03, 03:14 AM
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satellites...
On Wed, 10 Sep 2003 01:44:52 +0200, "Gabriel Hétet"
wrote: Hello I m a 12 years old boy how many satellites are there on this earth ? thank you. http://liftoff.msfc.nasa.gov/RealTim.../JTrack3D.html This is a NASA site cool stuff! scambron
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