Extraterrestrial life in the universe (original) (raw)
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Abstract
The possibility that life exists elsewhere in the universe, even in our own planetary system, has intrigued scientists, philosophers, and theologians for centuries. The spaceflight programs of NASA have provided much new information about our planetary neighbors and have put to rest some speculations about the existence of life on those planets or their satellites. However, there are still undetermined questions about the possibility of some form of life existing in the far distant past in our planetary system. Beyond our planetary system, the astronomical quest for scientific clues about life continues, largely via the radio telescope. Thus far there is no conclusive evidence. Here, some of the recent findings about our planetary neighbors are reviewed and the question about life elsewhere in the universe is addressed.
Publication:
NASA STI/Recon Technical Report N
Pub Date:
February 1990
Bibcode:
Keywords:
- Extraterrestrial Life;
- Planets;
- Space Flight;
- Universe;
- Astronomy;
- Radio Telescopes;
- Space Sciences (General)