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"If we're going to be consistent and advocate freedom of speech we have to advocate freedom of encrypted speech too. The genie is out of the bottle, cryptologically."
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I'm interested in this item because it appears to predate the field of radio astronomy by at least a generation:
Radio waves from space were first detected by engineer Karl Guthe Jansky in 1932 at Bell Telephone Laboratories in Holmdel, New Jersey using an antenna built to study radio receiver noise. The first purpose-built radio telescope was a 9-meter parabolic dish constructed by radio amateur Grote Reber in his back yard in Wheaton, Illinois in 1937. The sky survey he performed is often considered the beginning of the field of radio astronomy.
It turns out that the sun is a significant source. The Sun was one of the first objects studied by early radio astronomers. Other objects in the sky are much more powerful, but the sun's close proximity to us makes it appear radio-bright to us here on the third planet. Solar flares on the Sun's surface are often accompanied by a burst of radio energy. Comment/Join this discussion ( 0 ) | RSS/XML | Blog This | Additional
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