| タイトル | Thermal history, chemical composition and relationship of comets to the origin of life |
| 著者（英） | Leschine, S. B.; Schloerb, F. P.; Irvine, W. M. |
| 著者所属（英） | Onsala Space Observatory|Massachusetts Univ. |
| 発行日 | 1980-02-21 |
| 言語 | eng |
| 内容記述 | The role of thermal processes in determining the chemical composition of comets is considered, and implications of possible cometary constituents for the origin and evolution of life on earth are discussed. It is shown that the inclusion of short-lived Al-26 from a nearby supernova explosion into cometary nuclei could lead to comets with surfaces cool enough to retain H2O and interiors warm enough for thermal processing to occur, with the production of complex organic molecules such as amino acids and nucleic acid bases. It is thus suggested that comets may have played a part in seeding the primitive earth with biological polymers capable of self-replication or of evolving towards that capability, and may even be responsible for the subsequent introduction of organic material capable of infecting already existing cells. |
| NASA分類 | SPACE BIOLOGY |
| レポートNO | 80A24492 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/422770 |
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