Publication Date:
2019-08-14
Description:
Since interstellar travel is not economically possible on the time scale of a human lifetime, communication with extraterrestrials can be achieved only by sending some form of energy or matter across space; photons (electromagnetic waves) are best. Of particular interest to SETI is the region from about 1,000-60,000 MHz known as the free-space microwave window. During the course of NASA's Cyclops program, it was pointed out that the hydrogen and hydroxyl lines bounded a band in which there were no other known lines. The threatened loss of the microwave window to earth-based services is discussed.
Keywords:
SPACE SCIENCES (GENERAL)
Type:
Planetary Report (ISSN 0736-3680); 7; 23-25
Format:
text
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