Results 21 to 30 of about 1,439,753 (202)
Frontiers in Astronomy and Space Sciences, 2020 Over several decades, UCSD has developed and continually updated a time-dependent iterative three-dimensional (3-D) reconstruction technique to provide global heliospheric parameters—density, velocity, and component magnetic fields.
Bernard V. Jackson +7 more
doaj +1 more source
Extension of the sun-synchronous Orbit [PDF]
, 2010 Through careful consideration of the orbit perturbation force due to the oblate nature of the primary body a secular variation of the ascending node angle of a near-polar orbit can be induced without expulsion of propellant.
Bosquillon de Frescheville, Francois +9 more
core +4 more sources
Contemporary Icarus: Gustav von Aschenbach’s Journey towards the Sun
Czytanie Literatury, 2020 The point of departure for the reflections contained in this article is the motif of the sun in Tomasz Mann’s Death in Venice. Analysing the presence of the sun in the work turns out to be fruitful for distinguishing and connecting several symbolic ...
Anna Sieradzan
doaj +1 more source
Astronomical features of Ural megalithic monuments orientation [PDF]
Archaeoastronomy and Ancient Technologies, 2014 There is a presence of archaeological monuments of the early and middle Holocene in the middle Trans-Urals, which may be associated with the act of sky survey, determined by this specific landscape.
Viktorova, V.D., Anisimov, N.P.
doaj +1 more source
Sudden transitions and grand variations in the solar dynamo, past and future☆
Journal of Space Weather and Space Climate, 2012 The solar dynamo is the exotic dance of the sun’s two major magnetic field components, the poloidal and the toroidal, interacting in anti-phase. On the basis of new data on the geomagnetic aa index, we improve our previous forecast of the properties of ...
De Jager Cornelis, Duhau Silvia
doaj +1 more source
The fine structure of the rotational periods of the solar mean magnetic field
Open Astronomy, 2021 The data of mean magnetic field (MMF) of the Sun obtained at the Wilcox Solar Observatory (Stanford, USA) in 1975–2020 are analysed. It was concluded that the MMF maximum occurs, on average, 1.5–2 years later relative to the maximum of Wolf numbers.
Haneychuk Vasily Ivanovich +1 more
doaj +1 more source
Isolated Sunspot with a Dark Patch in the Coronal Emission
Open Astronomy, 2012 On the base of the 17 GHz radio maps of the Sun taken with the Nobeyama Radio Heliograph we estimate plasma parameters in the specific region of the sunspot atmosphere in the active region AR 11312.
Bezrukov D. A. +2 more
doaj +1 more source
Journal of Space Weather and Space Climate, 2020 We present the observing program proposed by Paris and Côte d’Azur Observatories for monitoring solar activity during the upcoming cycle 25 and providing near real time images and movies of the chromosphere for space-weather research and applications ...
Malherbe Jean-Marie +2 more
doaj +1 more source
Revealing Fifth-Grade Students’ Understanding of the Universe
Mimbar Sekolah Dasar, 2022 Previous research has shown that students at almost all levels have misconceptions about both the shapes and sizes of celestial bodies in space. This study is essential to conduct on the students who take space topic in their schools for the first time ...
Fatma Coştu +2 more
doaj +1 more source
Latitudinal Distribution of Sunspot and North-South Asymmetry Revisited [PDF]
Journal of Astronomy and Space Sciences, 2018 The solar magnetic field plays a central role in the field of solar research, both theoretically and practically. Sunspots are an important observational constraint since they are considered a discernable tracer of emerged magnetic flux tubes, providing ...
Heon-Young Chang
doaj +1 more source