Tails of Comets
نویسندگان
چکیده
منابع مشابه
Following comets
an inferior hand of genes. Fetuses are today commonly screened for genetic disorders and this service will no doubt expand. An American company has devised a one-inch chip carrying 400,000 DNA fragments, which will allow the entire human genome to be screened for an average of four alleles per gene. The difference between eliminating the undesirable and promoting the advantageous is becoming to...
متن کاملObservations of molecules in comets
Comets are among the most primitive bodies of the Solar System, and their chemical composition is rich in information on the protosolar nebula and its possible connection with interstellar cloud chemistry. Comets are also a source of light atoms and probably of prebiotic organic molecules for the early Earth. We know better and better cometary volatiles through spectroscopy, mainly at infrared ...
متن کاملCCD photometry of distant comets
While it is apparent that many comets are active beyond the canonical distance of 3 AU, few surveys of cometary activity have been performed in this region previously. Such a survey enables a more accurate determination of the proportion of comets that exhibit little or no outgassing at these distances. Results are presented of CCD observations of comets in the region of 3 AU ≤ Rh ≤ 6 AU obtain...
متن کاملMedical Comets: Scholarly Contributions
collection of pages from lecture notes, the lab manual, and figures from Haines and Nolte. In other words, for medical students studying neuroanatomy there was no single yet comprehensive source that would address the gritty neuroanatomical details and yet present integrative cases that would illustrate the diseases such as Parkinson's in the context of a clinical setting. So when I had the cha...
متن کاملIUE Observations of Faint Comets
Ultraviolet spectra of seven comets taken with the same instrument are presented. Comets P/Encke (1980), P/Tuttle (1980 h), P/Stephan-Oterma (1980 g), and Meier (1980 q) were observed during November-December 1980 with the International Ultraviolet Explorer (IUE) satellite observatory, while comets P/Borrelly (1980 i) and Panther (1980 u) were observed with IUE on 6 March 1981. The spectra of t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1870
ISSN: 0028-0836,1476-4687
DOI: 10.1038/002025a0