In Search of the Dark Matter in the Universe
... since there was only one force ruling everything. Today, however, we distinguish four fundamental forces: the force of gravity, which attracts us to the earth and the planets to the sun, the electromagnetic force, which keeps the negatively charged electrons in the outer shell of an atom attracted t ...
... since there was only one force ruling everything. Today, however, we distinguish four fundamental forces: the force of gravity, which attracts us to the earth and the planets to the sun, the electromagnetic force, which keeps the negatively charged electrons in the outer shell of an atom attracted t ...
Relativity - PAC
... Betelgeuse in a spacecraft moving at v = 0.75c with respect to the Earth. Three years after departure from the Earth (as measured by the astronaut’s clocks) one of the astronauts announces that she has given birth to a baby girl. The other astronauts immediately send a radio signal to Earth announci ...
... Betelgeuse in a spacecraft moving at v = 0.75c with respect to the Earth. Three years after departure from the Earth (as measured by the astronaut’s clocks) one of the astronauts announces that she has given birth to a baby girl. The other astronauts immediately send a radio signal to Earth announci ...
THE VIRTUAL INEVITABILITY OF SINGULARITIES IN
... occurs on a spacelike surface, like the big bang singularity of the standard Robertson Walker cosmology. However, the fact that inflationary spacetimes are past incomplete forces one to address the question of what, if anything, came before.17 (Italics mine). In 1997, Borde and Vilenkin recognized a ...
... occurs on a spacelike surface, like the big bang singularity of the standard Robertson Walker cosmology. However, the fact that inflationary spacetimes are past incomplete forces one to address the question of what, if anything, came before.17 (Italics mine). In 1997, Borde and Vilenkin recognized a ...
Soft Hair on Black Holes - Physics (APS)
... and cosmic censorship requires all physical particles to be larger than the Planck length, effectively setting a minimum spatial size for excitable pixels. This gives an effective number of soft hairs proportional to the area of the horizon in Planck units and hints at a connection to the areaentrop ...
... and cosmic censorship requires all physical particles to be larger than the Planck length, effectively setting a minimum spatial size for excitable pixels. This gives an effective number of soft hairs proportional to the area of the horizon in Planck units and hints at a connection to the areaentrop ...
the book - The Well Balanced Universe
... the most important unsolved problem in physics. Secondly, there is no proof that gravity acts in exactly the same manner in other parts of the universe; it is simply assumed. Whenever observa tions have indicated that this assumption might be false, alternative explanations have always been preferr ...
... the most important unsolved problem in physics. Secondly, there is no proof that gravity acts in exactly the same manner in other parts of the universe; it is simply assumed. Whenever observa tions have indicated that this assumption might be false, alternative explanations have always been preferr ...
A novel study in relation between the mass and gravity
... and Massey et al. (2007), existence of a gravity force (for example, a gravity lens effect) without a visible celestial particle is referred to as a mass of dark matter. But by accepting the existence of gravity generators, this can simply be referred to as a young gravity generator that has not gat ...
... and Massey et al. (2007), existence of a gravity force (for example, a gravity lens effect) without a visible celestial particle is referred to as a mass of dark matter. But by accepting the existence of gravity generators, this can simply be referred to as a young gravity generator that has not gat ...
general relativity and gravitational waves
... of relativity (SRT). This is the Minkowski metric. Thus, we can choose at each point P of the manifold a coordinate system in which the Minkowski metric is valid. While in the SRT this can be a global coordinate system, in general relativity (GR) this is only locally possible. With this procedure w ...
... of relativity (SRT). This is the Minkowski metric. Thus, we can choose at each point P of the manifold a coordinate system in which the Minkowski metric is valid. While in the SRT this can be a global coordinate system, in general relativity (GR) this is only locally possible. With this procedure w ...
Physics as Spacetime Geometry
... those implications might turn out to be necessary for the advancement of fundamental physics, Section 2 deals with the essence of the spacetime concept (the reality of spacetime, i.e. that the world is four-dimensional) and argues that the relativistic experimental evidence provides strong support f ...
... those implications might turn out to be necessary for the advancement of fundamental physics, Section 2 deals with the essence of the spacetime concept (the reality of spacetime, i.e. that the world is four-dimensional) and argues that the relativistic experimental evidence provides strong support f ...
APS Slide Presentation
... • The ramifications of the discovery of dark energy, dark matter, supermassive black holes, and inflation have only begun to impact physics in general and cosmology in particular. Dark energy generally has not been factored into all universe formation models, but when considered, it changes everythi ...
... • The ramifications of the discovery of dark energy, dark matter, supermassive black holes, and inflation have only begun to impact physics in general and cosmology in particular. Dark energy generally has not been factored into all universe formation models, but when considered, it changes everythi ...
Relativity
... The Bending of Starlight The curving of light in the presence of a gravitational mass would be very, very slight, so Einstein needed to find an example in Nature that was on a scale that could be detected. He chose to predict the bending of starlight as it passes by the Sun. ...
... The Bending of Starlight The curving of light in the presence of a gravitational mass would be very, very slight, so Einstein needed to find an example in Nature that was on a scale that could be detected. He chose to predict the bending of starlight as it passes by the Sun. ...