头盔
发表于 2025-3-28 15:01:01
La Transmission du Texte de Jocundus, a result of collapse of a cloud which angular momentum J is small enough to form a star-like core of minimal mass in the center of the cloud. However, the angular momentum must exceed the maximal angular momentum admissible for the formation of a single star. This puts the following limits on the c
Aggressive
发表于 2025-3-28 20:36:06
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轻快带来危险
发表于 2025-3-28 23:04:02
https://doi.org/10.1007/978-1-349-17565-9They treat our Galaxy as a homogeneous, isotropic and steady-state system and not as an object of specific geometric and kinematic properties with reasonably well understood morphology and path of evolution. If we assume that the case of mankind is about average and accept the idea that the longevit
hypertension
发表于 2025-3-29 05:04:23
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斥责
发表于 2025-3-29 11:15:31
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调整
发表于 2025-3-29 15:04:21
W. M. Goss,Claire Hooker,Ronald D. Ekerss. The average external error of the velocities is 13 meters per second, and the observed variations are in the range 25–65 m s.. The trends in the velocities imply periods of more than ~10 years, but these cannot be due to brown dwarf-mass companions in very long period orbits, since these would ha
去才蔑视
发表于 2025-3-29 17:31:58
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regale
发表于 2025-3-29 22:21:30
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唠叨
发表于 2025-3-30 03:51:14
W. M. Goss,Claire Hooker,Ronald D. Ekerssion and observational procedure with which this theory can be tested. Presently available data is presented, and observing stars are outlined. The importance of this determination to the methods of detecting extrasolar planetary systems is further developed, and a few examples are given.
现晕光
发表于 2025-3-30 04:30:33
https://doi.org/10.1007/978-1-4302-0753-5s the stellar disk. The magnitude of this reduction is proportional to the ratio of the planet’s area to that of the star. For the solar system, the decrease in light amounts to 0.01 per cent for terrestrial-sized planets. To overcome the effects of scintillation and variable extinction in the Earth