Results 211 to 220 of about 1,222,295 (266)
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Space Science Reviews, 1998
Various observable properties of the Sun are compared with those of solar-type stars. It is concluded that the Sun, to a remarkable degree, is “solar-type”. As regards its particular mass and age, and probably its non-binarity, “anthropic” explanations may seem in place.
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Various observable properties of the Sun are compared with those of solar-type stars. It is concluded that the Sun, to a remarkable degree, is “solar-type”. As regards its particular mass and age, and probably its non-binarity, “anthropic” explanations may seem in place.
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Science, 2022
Searches during twilight toward the Sun have found several asteroids near Venus ...
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Searches during twilight toward the Sun have found several asteroids near Venus ...
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The Sun, Sun Myths, and Sun Worship
1976Most of us take the sun for granted. We know it to be a heavenly body subject to the same laws of physics that govern events on earth. For example, we know that the earth’s axis is not vertical to the earth’s orbit around the sun; that the resultant oblique angles at which the sun’s rays strike the earth cause seasonal variation in radiation (as Figure
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Science, 1967
Dicke has interpreted his recent measurement of the sun's oblateness as implying a fast (1.8-day period) rotation of the solar radiative interior. We find that differentially rotating solar models, such as the one proposed by Dicke, are unstable. The rate of turbulent diffusion in the unstable regions of these models is so rapid that it appears to ...
Goldreich, Peter, Schubert, Gerald
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Dicke has interpreted his recent measurement of the sun's oblateness as implying a fast (1.8-day period) rotation of the solar radiative interior. We find that differentially rotating solar models, such as the one proposed by Dicke, are unstable. The rate of turbulent diffusion in the unstable regions of these models is so rapid that it appears to ...
Goldreich, Peter, Schubert, Gerald
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Sun Exposure and Melanomas on Sun-Shielded and Sun-Exposed Body Areas
2014Malignant melanoma is a tumor that arises from melanocytes and accounts for around 4% of all malignancies in Europe and Northern America and for about 11% in Australia and New Zealand. About 10% of primary melanomas arise from sites not exposed to sun. Acral lentiginous melanoma, mucosal melanoma (in the oral cavities, nasal sinuses, genital tract and ...
Asta, Juzeniene +2 more
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Journal of Scientific Instruments, 1925
The instrument described consists of a sundial geared to the hands of a clock and gives Greenwich mean time without observing a shadow or manipulating sliding scales. It is the invention of Professor W. E.
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The instrument described consists of a sundial geared to the hands of a clock and gives Greenwich mean time without observing a shadow or manipulating sliding scales. It is the invention of Professor W. E.
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Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2008
The nature of our star, the Sun, is dominated by its complex and variable magnetic fields. It is the purpose of this paper to review the fundamental nature of our magnetic Sun by outlining the most basic principles behind the way the Sun works and how its fields are generated, and to examine not only the historical observations of our magnetic star ...
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The nature of our star, the Sun, is dominated by its complex and variable magnetic fields. It is the purpose of this paper to review the fundamental nature of our magnetic Sun by outlining the most basic principles behind the way the Sun works and how its fields are generated, and to examine not only the historical observations of our magnetic star ...
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Ugeskrift for laeger, 1994
Protection against the sun in Denmark is only necessary from mid April to September. The number of erythema units may reach about 16 per day in the summer sun and about 50% of the biological active radiation is found between 12 a.m. and 3 p.m. (summertime).
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Protection against the sun in Denmark is only necessary from mid April to September. The number of erythema units may reach about 16 per day in the summer sun and about 50% of the biological active radiation is found between 12 a.m. and 3 p.m. (summertime).
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Scientific American, 1975
Observations of solar rotation are reviewed. There are two basic methods of determining the rotation of the sun. One is to measure the daily or monthly positions of tracers on the surface or in the corona, and the other is to measure line‐of‐sight velocities with the Doppler effect in spectrum lines.
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Observations of solar rotation are reviewed. There are two basic methods of determining the rotation of the sun. One is to measure the daily or monthly positions of tracers on the surface or in the corona, and the other is to measure line‐of‐sight velocities with the Doppler effect in spectrum lines.
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