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[Phys-L] Sound waves in space?

Something about sound waves in space doesn't make sense to me:

http://www.ouramazingplanet.com/4228-tohoku-earthquake-space-infrasound.html

But I guess there is still some measurable atmosphere at 270 km?

kyle
-----------------------------
"The most important thing one can acquire in college is a well functioning bullshit meter."
-Andrew Delbanco


kyle forinash
kforinas@ius.edu<mailto:kforinas@ius.edu>
http://homepages.ius.edu/kforinas