41. But in 1948, these were loony ideas, and radio astronomy was a very young science. 42. In radio astronomy , the focus of a radio telescope. 43. Radio astronomy has continued to expand its capabilities, even using far side of the Moon.44. It was published in 1990 by the Radio Astronomy Group of the University of Cambridge. 45. And these manmade constellations, they complain, are increasingly invading the frequencies assigned to radio astronomy . 46. There have been awards for pulsars and radio astronomy . 47. The agreement should help radio astronomy and communications'use of the spectrum to coexist productively ." 48. Some frequency bands are left unused to avoid interfering with radio astronomy and other scientific efforts. 49. Rake receivers are also used in radio astronomy . 50. The Five College Radio Astronomy Observatory was founded in 1969 by the Five College Astronomy Department.
