Results 231 to 240 of about 5,110 (265)
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Scientific American, 1994
▪ Abstract Astronomical studies in the extreme ultraviolet (EUV) band of the spectrum were dismissed during the early years of space astronomy as impossible, primarily because of the mistaken view that radiation in this band would be absorbed by the interstellar medium.
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▪ Abstract Astronomical studies in the extreme ultraviolet (EUV) band of the spectrum were dismissed during the early years of space astronomy as impossible, primarily because of the mistaken view that radiation in this band would be absorbed by the interstellar medium.
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Ultraviolet, optical and infrared astronomy
Physics Today, 1982While it is possible to trace the history of ultraviolet, optical and infrared astronomy to an era before that of the pre-Christian Greek astronomers at Alexandria, the field is not as static as this maturity might suggest. The flowering of space astronomy and the orders-of-magnitude improvement in detector technology give us exploratory capabilities ...
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Technologies and science archives for ultraviolet astronomy
Astrophysics and Space Science, 2014This paper summarizes 17 talks presented during the Technological sessions at the “Challenges in UV Astronomy” conference. It is based on summaries submitted by the presenters, on the slides of their talks, on notes written by the authors, and on additional material kindly submitted to the lead author.
Noah Brosch +2 more
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Ultraviolet Astronomy: Observational Aspects
1967The several disciplines which are incorporated under the heading ‘space research’ can be placed into the two broad categories of geophysics and astronomy. No hard and fast demarcation can be drawn and a considerable region of overlap exists, including, for example, the moon and planets.
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Ultraviolet and X-Ray Astronomy
2016This chapter discusses the astrophysics with photons having an energy up to hundreds of keV. X-rays are not able to penetrate atmosphere and space based observatories are needed. Telescopes for UV and softX-rays use reflective elements based on grazing incidence.
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A Discussion on astronomy in the ultraviolet - The ultraviolet spectrum of ζ Tauri
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1975Abstract This report describes a study of the ultraviolet spectrum of the B-shell star, Tauri. The observational material consists of high-dispersion spectrograms obtained from a rocket experiment launched in November 1972. The spectra cover the wavelength interval, 1100-2050 A, with a resolution of about 0.1 A. The u.v. stellar lines
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A Discussion on astronomy in the ultraviolet - A study of variable stars in the ultraviolet
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1975Abstract Some of the OAO-2 ultraviolet observations of intrinsically variable stars are discussed. New data is presented for the Ap variable t Cassiopeiae. The cepheid variables are illustrated by a Ursae Minoris. The explosive variables Nova Serpentis 1970, Nova Aquilae 1918, SS Cygni, and the 1972 supernova in NGC 5253 are compared.
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3A. Ultraviolet Astronomy (Non-IUE)
Transactions of the International Astronomical Union, 1988Results from the IUE satellite, summarized in the section which follows this one, continue to dominate the literature for research topics which rely on observations in the ultraviolet. This trend may be accentuated in the near future, as we experience the natural attrition of papers based on results from previous major missions which are no longer ...
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Ultraviolet radiation physics in astronomy and geophysics
Journal of Quantitative Spectroscopy and Radiative Transfer, 1962Abstract The astrophysicist has been compelled, in his studies of the solar and stellar atmospheres, to abandon in some cases the simpler “local thermodynamic equilibrium” approach. The new approach assumes statistical equilibrium and writes equations which concern the transfer of energy.
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