Did Life Come From Space? “Panspermia Theory”

Öz

One of the most important discussions in the history of biology is on the origin of life. Many theories have been proposed concerning how life on earth has emerged. The most interesting among them is the panspermia theory which defends that life on earth has its origins in other planets. In this study, after examining the reasons of the appearance of the panspermia theory, its main arguments and historical development, the possibility of still defending this theory in our age will be discussed.

Anahtar Kelimeler

• Panspermia, Interplanetary transfer of life, Origin of life, Arrhenius, Thomson, Helmholtz, Crick ve

Yaşam Uzaydan Mı Geldi? “Panspermia Teorisi”

Öz

Biyoloji tarihindeki en önemli tartışmalardan biri yaşamın kökeni tartışmasıdır. Dünya üzerindeki yaşamın nasıl ortaya çıktığı ile ilgili birçok teori ortaya atılmıştır. Bu teorilerden en ilginç olanı, Dünya üzerindeki yaşamın diğer gezegenlerden köken aldığını savunan panspermia teorisidir. Bu çalışmada ilk olarak panspermia teorisinin ortaya çıkma nedenleri, temel argümanları ve tarihsel gelişimi incelendikten sonra, bugünkü bilimsel veriler ışığında bu teorinin günümüzde hala savunulup savunulamayacağını tartışılacaktır.

Anahtar Kelimeler

• Panspermia, Gezegenler arası Yaşam Transferi, Yaşamın Kökeni, Arrhenius, Thomson, Helmholtz, Crick ve Orgel, Hoyle ve Wickramasinghe

Kaynakça

1. Arrhenius, S. (1908), Worlds inthe Making, çev. H. Born, New York and London, Harper & Brother Publishing.
2. Brack , A. ve Westall, F. (2011) STONE, Encyclopedia of Astrobiology, Springer, ss. 1601-602.
3. Bowler, P. J. (1989), Evolution: The History an Idea, Revised Edition, California Press.
4. Chappell, W. R., Meglen, R. R. ve Runnels, D. D., Comments on Directed Panspermia, Icarus 21, ss. 513-515.
5. Crick, F. and Orgel, L. (1973) Directed panspermia, Icarus 19, ss. 341-346.
6. De Vera, J. P. (2011), Panspermia, Encyclopedia of Astrobiology, Springer, ss. 1213-1214.
7. Geraci, G., R. del Gaudio and B. D’Argenio (2001), Microbes in rocks and meteorites: a new form of life unaffected by time, temperature, pressure. Red. Fis. Acc. Lincei, 12, ss. 51-68.
8. Helmholtz, H. von (1871), On the origin of the planetary system, in Popular Lectures on Scientific Subjects, çev. E. Atkinson, Longmans, Greens Co., London, 1908, ss. 139-198.

9. Hernâni L.S, Maia, Keith G. Orrell and Ilda V.R. Dias, Origin of Life Recent Contributions to a Scientific Model, 2010, 15 Mayıs 2013 tarihinde http://www.archive.org/details/OriginOfLife adresinden erişildi.
10. Horneck, G., Bucker, H., and Reitz, G. (1994), Long-term survival of bacterial spores in space, Adv Space Res14: ss. 41–45.
11. Horneck G., Stöffler D, Ott S., Hornemann U., Cockell C. S., Möller R., Meyer C., de Vera J. P., Fritz J., Schade S., Artemieva N. (2008), Microbial rock inhabitants survive impact and ejection from host planet: first phase of lithopanspermia experimentally tested, Astrobiology 8(1):17–44.
12. Horneck, G., Miliekowsky, C., Melosh, H.J., Wilson, J.W., Cucinotta, F.A., and Gladman, B. (2002) Viable transfer of microorganisms in the solar system and beyond. In Astrobiology: The Quest for the Conditions of Life, edited by G. Horneck and C. Baumstark-Khan, Springer, Berlin, ss. 55–76.
13. Hoyle, F. and Wickramasinghe, N.C., (1978), Lifecloud: the Origin of Life in the Galaxy, London: J.M. Dent.
14. Hoyle, F. and Wickramasinghe, N.C., (1979), Diseases from Space, London: J.M. Dent.
15. Hoyle, F. and Wickramasinghe, N.C., (1980), Evolution from Space, London: J.M. Dent.
16. Kamminga, H., (1982), Life From Space – History of Panspermia, Vistas in Astronomy 26, ss. 67-86.
17. Panspermia 2000, Astrophysics and Space Science 268: ss. 1–17, 1999.
18. Walter Kranz, Antik Felsefe, Sosyal Yayınları, 1984, ss. 148-149.
19. Thomson, W. (1871) Report of the Forty First Meeting of The British Association for the Advancement of Science; Held at Edinburgh in Agust 1871, John Murray, London 1872.
20. Stoöffler D., Horneck G., Ott S., Hornemann U., Cockell C. S., Möller R., Meyer C., de Vera J. P., Fritz J., Artemieva N.A. (2007) Experimental evidence for the impact ejection of viable microorganisms from Mars-like planets, Icarus 186: ss. 585–588.