PROF. SUBRAHMANYAN CHANDRASEKHAR, assistant professor of theoretical astrophysics at the University of Chicago, described some results of his investigations of the origin and distribution of the chemical elements of the universe in a paper read during the fiftieth anniversary celebrations of the University...
The origin of the atoms is now well understood. It is one of the greatest astrophysical discovery in the twentieth century. All the elements in the Mendeleev table, and specifically the atoms of life: carbon, nitrogen and oxygen, come from the work of all generations of stars in galaxies. ...
【麻省理工公开课|原汁原味】Cosmic Origin of the Chemical Elements(7)。听TED演讲,看国内、国际名校好课,就在网易公开课
of origin, the features of the browser and the operating system utilized by the user, the various time details per visit (e.g., the time spent on each page within the site) and the details about the path followed within the site with special reference to the sequence of pages visited, ...
Li, Be, B are secondary in cosmic rays, as are many of the odd-Z elements, as well as the sub-Fe elements. At very low energies, cosmic ray particles are subject to ionization losses, which produce a steep low energy cutoff; all particles below the cutoff are moved into the thermal ...
13. The first was written with his adviser, George Gamow, a Russian-born physicist with a puckish turn of mind who obtained permission to include as a co-author Hans Bethe, an authority on the origin of cosmic elements. 一被写了与他的顾问,乔治?Gamow,俄国出生物理学家以获得允许包括作为共同...
The origin of this uncertainty is described in Methods. A dedicated sea campaign is planned in the future to improve the knowledge of the positions of the detector elements on the seafloor; a recalibration of all data will then be performed and will allow us to approach the intrinsic ...
The origin of this uncertainty is described in Methods. A dedicated sea campaign is planned in the future to improve the knowledge of the positions of the detector elements on the seafloor; a recalibration of all data will then be performed and will allow us to approach the intrinsic ...
On the origin of cosmic raysphysicscosmic radiationastrophysicscosmic radiationdistributionearthelementsenergyenergy rangegev rangeA brief survey is given of the various physical, astronomical and radioastronomical data pertaining to cosmic ray nuclei with energies above 1 Gev. A theory is then outlined, ...
The absolute intensity of cosmic radiation was estimated from the frequency of supernova explosions, about one per 100 years. The distribution of elements in cosmic radiation agreed well with that expected in the outermost parts of the supernova star. It was found that shock structure could be ...