How High Can You Fly?

By j7uy5 on August 7, 2006.

Here are a couple more vacation photos...



i-112461f883dae9138758f52b466f8e9e-iss-500px.jpg





i-2c4ef6b30189c7deb6cca36e0cdf0408-clouds-500px.jpg



Notice that the bottom photo may seem to have been taken from a greater
altitude, although that is not the case.  The top one is not
really a
vacation photo; it's from the href="http://antwrp.gsfc.nasa.gov/apod/ap060724.html">Astronomy
Picture of the Day site.  (Credit: href="http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts121/121_crew.html">STS-121
Crew, href="http://www.nasa.gov/mission_pages/station/expeditions/expedition13/index.html">Expedition
13 Crew, NASA)



The top one was taken from a Space Shuttle; the bottom one was taken
from a Boeing 737-500.  The use of a wide-angle lens, and the
placement of the horizon close to the top of the picture, causes the
horizon to look as though it is has greater curvature; this causes the
appearance of a higher altitude.  



The top photo shows a greater color gradient in the sky, which is a
clue that it is the one that actually was taken from a greater
altitude.


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