缩减了
发表于 2025-3-25 03:28:05
Daniel Denninger,Maik Berger,Yordan KyosevAs is widely known, black holes are astrophysical objects so dense that the light cannot escape them. The idea that such objects might exist predates the era of modern physics. Newtonian physics may be used to predict the existence of “dark stars,” starts that possess gravitational field so strong, that the light they radiate is unable to escape.
ciliary-body
发表于 2025-3-25 09:23:39
Urban Elites and the Regenerative Processes,Neutron starts are smallest and densest stars known. Their radii may be estimated theoretically to be around 10-12 km (the radius of an average human city), while their typical masses are 1.4 to 2 times the Solar mass (note that the mass of the Sun accounts for 99.86% of the mass of the entire Solar System).
FAWN
发表于 2025-3-25 14:15:11
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Callus
发表于 2025-3-25 18:13:52
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Condescending
发表于 2025-3-25 21:07:56
Plane Gravitational WavesBefore we start diving into the fundamental theory trying to understand the origins of GWs, let us explore their properties in the simplest case: that of a plane GW. The reader should already have a “picture” of what one looks like from the previous chapter. Now we are going to put it on a more mathematical basis.
GROWL
发表于 2025-3-26 00:33:36
Frame-Drag Field as Gravimagnetic FieldAs was discussed in Chapter 7, because of 4-dimensional nature of spacetime, moving sources produce additional fields. Having established that the proper analogue of vector electric fields are rank-2 tensor gravielectric fields, rather than gravitational force fields, we now look at the rank-2 tensor gravimagnetic fields.
calorie
发表于 2025-3-26 08:10:21
Overview of General RelativityElectromagnetism has not one, but four potentials: the scalar potential Φ, and the vector potential .. These give rise to two vector fields, . and ., which constitute the six elements of a second-rank, antisymmetric field-strength tensor.
anthropologist
发表于 2025-3-26 09:01:35
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组成
发表于 2025-3-26 15:24:56
Black HolesAs is widely known, black holes are astrophysical objects so dense that the light cannot escape them. The idea that such objects might exist predates the era of modern physics. Newtonian physics may be used to predict the existence of “dark stars,” starts that possess gravitational field so strong, that the light they radiate is unable to escape.
痛苦一生
发表于 2025-3-26 18:01:49
Neutron StarsNeutron starts are smallest and densest stars known. Their radii may be estimated theoretically to be around 10-12 km (the radius of an average human city), while their typical masses are 1.4 to 2 times the Solar mass (note that the mass of the Sun accounts for 99.86% of the mass of the entire Solar System).