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| A SEARCH FOR LIFE ON EARTH FROM THE GALILEO SPACECRAFT |
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| Author(s): SAGAN C, THOMPSON WR, CARLSON R, GURNETT D, HORD C |
| Source: NATURE Volume: 365 Issue: 6448 Pages: 715-721 Published: OCT 21 1993 |
| Times Cited: 78 References: 34 |
| Abstract: In its December 1990 fly-by of Earth, the Galileo spacecraft found evidence of abundant gaseous oxygen, a widely distributed surface pigment with a sharp absorption edge in the red part of the visible spectrum, and atmospheric methane in extreme thermodynamic disequilibrium; together, these are strongly suggestive of life on Earth. Moreover, the presence of narrow-band, pulsed, amplitude-modulated radio transmission seems uniquely attributable to intelligence. These observations constitute a control experiment for the search for extraterrestrial life by modern interplanetary spacecraft. |
| Document Type: Article |
| Language: English |
| Reprint Address: SAGAN, C (reprint author), CORNELL UNIV, PLANETARY STUDIES LAB, ITHACA, NY 14853 USA |
Addresses:
1. JET PROP LAB, ATMOSPHER & COMETARY SCI SECT, PASADENA, CA 91109 USA
2. UNIV IOWA, DEPT PHYS & ASTRON, IOWA CITY, IA 52242 USA
3. UNIV COLORADO, ATMOSPHER & SPACE PHYS LAB, BOULDER, CO 80309 USA |
| Publisher: MACMILLAN MAGAZINES LTD, PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW |
| Subject Category: Multidisciplinary Sciences |
| IDS Number: MC812 |
| ISSN: 0028-0836 |
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| | | | | | | | | Record from Web of Science® | | | | | | | | | |