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How high is space
What is the edge of space? I know peeps think space is 150 miles up or
200 miles up when you go up in a rocket, but what is the OFFICIAL edge of the earth atmosphere? Does international astronomical union have accepted definition of where the atmosphere ends and your in space. |
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How high is space
wrote:
What is the edge of space? I know peeps think space is 150 miles up or 200 miles up when you go up in a rocket, but what is the OFFICIAL edge of the earth atmosphere? Does international astronomical union have accepted definition of where the atmosphere ends and your in space. I believe NASA put the start of space at 100Km -- Gareth Slee http://www.meroffice.com |
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How high is space
Gareth Slee wrote:
wrote: What is the edge of space? I know peeps think space is 150 miles up or 200 miles up when you go up in a rocket, but what is the OFFICIAL edge of the earth atmosphere? Does international astronomical union have accepted definition of where the atmosphere ends and your in space. I believe NASA put the start of space at 100Km I'm not sure how much NASA/DoD accepts that figure (Asronaut Wings were given to those who exceeded 50 miles, which included some X-15 pilots), but most others (including the X-Prize people) do go with 100km/62.5mi as their dividing line. -- Frank You know what to remove to reply... Check out my web page: http://www.geocities.com/stardolphin1/link2.htm "To confine our attention to terrestrial matters would be to limit the human spirit." - Stephen Hawking |
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How high is space
On Sat, 18 Nov 2006 14:56:25 +0000, Gareth Slee wrote:
wrote: What is the edge of space? I know peeps think space is 150 miles up or 200 miles up when you go up in a rocket, but what is the OFFICIAL edge of the earth atmosphere? Does international astronomical union have accepted definition of where the atmosphere ends and your in space. I believe NASA put the start of space at 100Km But how is it defined, 100Km sound like the number is too round. Wouldn't a better definition be one time around the Earth in orbit with some sort of standard mass, standard drag coeficient, at some standard or maximum atmospheric size. -- Craig Fink Courtesy E-Mail Welcome @ |
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On Sat, 18 Nov 2006 16:48:50 +0000, Frank Glover wrote:
Gareth Slee wrote: wrote: What is the edge of space? I know peeps think space is 150 miles up or 200 miles up when you go up in a rocket, but what is the OFFICIAL edge of the earth atmosphere? Does international astronomical union have accepted definition of where the atmosphere ends and your in space. I believe NASA put the start of space at 100Km I'm not sure how much NASA/DoD accepts that figure (Asronaut Wings were given to those who exceeded 50 miles, Another nice round arbitrary number 50. -- Craig Fink Courtesy E-Mail Welcome @ |
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How high is space
wrote in message ups.com... What is the edge of space? I know peeps think space is 150 miles up or 200 miles up when you go up in a rocket, but what is the OFFICIAL edge of the earth atmosphere? Does international astronomical union have accepted definition of where the atmosphere ends and your in space. http://en.wikipedia.org/wiki/Earth's_atmosphere pretty much covers it. H |
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How high is space
HLAH wrote: wrote in message ups.com... What is the edge of space? I know peeps think space is 150 miles up or 200 miles up when you go up in a rocket, but what is the OFFICIAL edge of the earth atmosphere? Does international astronomical union have accepted definition of where the atmosphere ends and your in space. http://en.wikipedia.org/wiki/Earth's_atmosphere pretty much covers it. I thought I heard 62 something or others on a quiz show not long ago. The link gives some three o so definitions. Not least among them the effective start of interference to re-entry at 75 miles. So what is a "Karman" line: "The Karman line, at 100 km (62 mi), is also frequently used as the boundary between atmosphere and space." or should I look it up? |
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How high is space
In sci.space.policy Craig Fink wrote:
On Sat, 18 Nov 2006 14:56:25 +0000, Gareth Slee wrote: wrote: What is the edge of space? I know peeps think space is 150 miles up or 200 miles up when you go up in a rocket, but what is the OFFICIAL edge of the earth atmosphere? Does international astronomical union have accepted definition of where the atmosphere ends and your in space. I believe NASA put the start of space at 100Km But how is it defined, 100Km sound like the number is too round. Wouldn't a better definition be one time around the Earth in orbit with some sort of standard mass, standard drag coeficient, at some standard or maximum atmospheric size. Equatorial orbit is probably an easy starting point. Then you'd have to specify space weather, as the atmosphere moves a bit. I suppose a spherical body, with density of 1000Kg/m^3 and a mass of You'd then have to specify what 'once around' meant. I suppose 'would impact on the ground at a point under the starting point' would about cover it. This is all horribly artificial of course, a lightweight parachute for something like an astronaut rescue system will have much more apparent drag, and an osmium telegraph pole much less. |
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