By 1933 Jansky had concluded that the source of the steady hiss he had detected with his antenna must be somewhere outside the earth since it seemed to move through the sky along with the stars in a manner consistent with its being of an extraterrestrial nature. He established an approximate direction for the source as 18 h right ascension and −10° declination. (Right ascension and declination are coordinates astronomers generally use to locate objects in the starry heavens, see Appendix A.7.)
KeywordsBlack Hole Radio Wave Radio Emission Radio Source Radio Telescope
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