Astronomy in Evolution
نویسندگان
چکیده
منابع مشابه
The Evolution of Neutrino Astronomy
The possibility of observing solar neutrinos began to be discussed seriously following the 1958 experimental discovery by Holmgren and Johnston that the cross section for production of the isotope Be by the fusion reaction He + He → Be+ γ was more than a thousand times larger than was previously believed. This result led Willy Fowler and Al Cameron to suggest that B might be produced in the sun...
متن کاملAstronomy and Astrophysics What Does Cluster Redshift Evolution Reveal ?
Evolution of the cluster population has been recognized as a powerful cosmological tool. While the pre-sent–day abundance of X-ray clusters is degenerate in σ 8 , n and Ω 0 , Oukbir and Blanchard (1992, 1997) have pointed out that the number density evolution of X-ray clusters with redshift can be used to determine Ω 0. Here, we clarify the origin of this statement by identifying those paramete...
متن کاملScientific Visualization in Astronomy: Towards the Petascale Astronomy Era
Astronomy is entering a new era of discovery, coincident with the establishment of new facilities for observation and simulation that will routinely generate petabytes of data. While an increasing reliance on automated data analysis is anticipated, a critical role will remain for visualization-based knowledge discovery. We have investigated scientific visualization applications in astronomy thr...
متن کاملAdaptive Optics in Astronomy
The field of adaptive optics (AO) has developed as a means to correct for the phase disturbances of an optical signal by understanding the medium through which it passes. This paper is intended to be a brief introduction to the field of adaptive optics with an emphasis the role of AO in astronomy. I. PERPTUAL TREMOR Since the time of Isaac Newton, it has been known that optical waves (in fact a...
متن کاملGravitational Lensing in Astronomy
Deflection of light by gravity was predicted by General Relativity and observationally confirmed in 1919. In the following decades, various aspects of the gravitational lens effect were explored theoretically. Among them were: the possibility of multiple or ring-like images of background sources, the use of lensing as a gravitational telescope on very faint and distant objects, and the possibil...
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: 1962
ISSN: 0028-0836,1476-4687
DOI: 10.1038/195316b0