More Elenin

[3DMonkey]

First:
Small private planes fly at 12,000 feet maximum. Passenger airliners fly from 32,000 to 40,000 feet. The Concorde super-sonic transport cruised at Mach 2 at 57,000 feet.
Small private planes fly at 12,000 feet maximum.

Passenger airliners fly from 32,000 to 40,000 feet.

The Concorde super-sonic transport cruised at Mach 2 at 57,000 feet.
Typical jet liners fly around 25,000 to 45,000 feet. Miltary fighters get up to 80,000 feet, some specialty planes such as The U2 spy plane and the SR-71 are thought to go as high as 120,000 feet. the x-15 has a ceiling of 354,000 feet

I guess you could count the space shuttle and space ship one as "planes" since it is powered and does glide so it would have a limitless range.



Read more: http://wiki.answers.com/Q/How_high_do_ai...z1cPfCBLu5

Second:

37000 is 7 miles. A 10 mile wide object 7 miles away will have an angle of 75 degrees.

An 800 foot long cruise ship from the distance of 521 feet has a viewing angle of 75 degrees.

http://www.1728.org/angsize.htm

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A ten mile wide object at 95,000 feet has a viewing angle of 30 degrees.

A ten foot wide wall at 18 feet away has a viewing angle of 30 degrees.