Results 21 to 30 of about 166,316 (291)

ANALYSIS OF SPHERICAL ASTRONOMY ALGORITHMS FOR PREDICTING THE SOLAR ECLIPSE BY W.M. SMART

Al-Hilal, 2022
A solar eclipse is an unusual natural occurrence. Muslims used the phenomenon of a solar eclipse as the season for prayer, which was only carried out during a solar eclipse from early in the phenomenon until the end.
Fiki Nuafi Qurrota Aini, Ahmad Luqman Hakim   +1 more
doaj   +1 more source

The Search for Other Planets and Life [PDF]

, 2010
This Les Houches School offers students a wide ranging view of the field of exoplanets and the search for life beyond the solar system. Observational and theoretical opportunities abound in a new field of astronomy that will be growing for decades to ...
Bean, Bennett, Bodenheimer, Boss, Burrows, Butler, Cash, Ch. Beichman, Charbonneau, Charbonneau, Chauvin, Chih-Hao, Deming, Des Marais, Fischer, Fridlund, Gaudi, Geisler, Gould, Ida, Ida, Johnson, Konacki, Lawson, Mao, Mayor, Nordman, Perryman, Richalet, Richardson, Saumon, Seager, Swain, Tanner, Tanner, Tarter, Traub, Trauger, Udry, Unwin, Wolsczan, Woolf, Wright   +42 more
core   +1 more source

Spatio-Temporal Analysis of Dust Storm Activity in Chryse Planitia Using MGS-MOC Observations from Mars Years 24–28

Universe, 2021
Dust storms, observed in all seasons, are among the most momentous of Mars’ atmospheric activities. The Entry–Descent–Landing (EDL) activity of a Martian landing mission is influenced by local atmospheric conditions, especially the probability of dust ...
Bo Li, Zongyu Yue, Shaojie Qu, Peiwen Yao, Xiaohui Fu, Zongcheng Ling, Shengbo Chen   +6 more
doaj   +1 more source

Electron-scale nested quadrupole Hall field in Cluster observations of magnetic reconnection [PDF]

Annales Geophysicae, 2015
This paper presents the first evidence of a new and unique feature of spontaneous reconnection at multiple sites in electron current sheet, viz. a "nested quadrupole" structure of the Hall field at electron scales, in Cluster observations.
N. Jain, A. S. Sharma
doaj   +1 more source

Planetary Science Goals for the Spitzer Warm Era [PDF]

, 2007
The overarching goal of planetary astronomy is to deduce how the present collection of objects found in our Solar System were formed from the original material present in the proto-solar nebula.
B. Bhattacharya, C. M. Lisse, D. Trilling, E. Ryan, H. B. Hammel, J. Emery, J. Stansberry, Lisa J. Storrie-Lombardi, M. V. Sykes, Nancy A. Silbermann, Y. Fernandez   +10 more
core   +2 more sources

ASTROD and ASTROD I -- Overview and Progress [PDF]

, 2007
In this paper, we present an overview of ASTROD (Astrodynamical Space Test of Relativity using Optical Devices) and ASTROD I mission concepts and studies.
Anderson J. D., Chandler J. F., Kumar P., Ni W.-T., Pulido Patón A., Samain É., Tinto M., Wang H., WEI-TOU NI, Williams J. G., Williams J. G., Wu A.-M., Wu A.-M., Xie Y., Xiong Y.   +14 more
core   +1 more source

Density Fluctuations in the Lower Thermosphere of Mars Retrieved From the ExoMars Trace Gas Orbiter (TGO) Aerobraking

Atmosphere, 2019
The upper atmosphere of Mars is constantly perturbed by small-scale gravity waves propagating from below. As gravity waves strongly affect the large-scale dynamics and thermal state, constraining their statistical characteristics is of great importance ...
David Jesch, Alexander S. Medvedev, Francesco Castellini, Erdal Yiğit, Paul Hartogh   +4 more
doaj   +1 more source

Over seven decades of solar microwave data obtained with Toyokawa and Nobeyama Radio Polarimeters

Geoscience Data Journal, 2023
Monitoring observations of solar microwave fluxes and their polarization began in Japan during the 1950s at Toyokawa and Mitaka. At present (April 2022), monitoring observations continues with the Nobeyama Radio Polarimeters (NoRP) at the Nobeyama campus
Masumi Shimojo, Kazumasa Iwai
doaj   +1 more source

Deciphering the Slow-rise Precursor of a Major Coronal Mass Ejection

The Astrophysical Journal Letters, 2023
Coronal mass ejections are explosive plasma phenomena prevalently occurring on the Sun and probably on other magnetically active stars. However, how their pre-eruptive configuration evolves toward the main explosion remains elusive.
X. Cheng, C. Xing, G. Aulanier, S. K. Solanki, H. Peter, M. D. Ding   +5 more
doaj   +1 more source

Thermodynamic and magnetic evolution of an eruptive C-class solar flare observed with SST/TRIPPEL-SP

Astronomy & Astrophysics
Solar flares are complex phenomena driven by the release of magnetic energy, but a large energy reservoir is not sufficient to determine their eruptive potential; the magnetic topology and plasma dynamics play a key role.
Díaz Baso C. J., de la Cruz Rodríguez J., Doerr H.-P., van Noort M., Prasad A., Feller A., Kiselman D.   +6 more
doaj   +1 more source