Why Do We Have to Go to Space to See All of the Electromagnetic Spectrum?

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E h? ? c/? E
hc/?
http//www.lbl.gov/MicroWorlds/ALSTool/EMSpec/EMSp
ec2.html
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Why Do We Have to Go to Space to See All of the
Electromagnetic Spectrum?
http//imagine.gsfc.nasa.gov/docs/science/know_l1/
emspectrum.html