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staedtler staedtler
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7 years ago
What strategies and electromagnetic frequencies are thought to be the most logical for long-range communication across the universe with other intelligent beings?
A)   Explosion of nuclear devices at specific intervals and in specific patterns across the Earth when we are closest to a nearby star
B)   Night-by-night photography of nearby stars at hydrogen Balmer wavelengths
C)   Continuous radio and microwave listening and transmitting at frequencies at which the natural radio sky noise background is low
D)   X-ray surveys of space at appropriate times (e.g., when Earth is closest to nearby stars in its orbit), in view of the penetrability of space at these wavelengths
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
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discovererdiscoverer
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7 years ago
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staedtler Author
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7 years ago
Grinning Face Exactly what I needed
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4 years ago
thank you
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