On the anomalous secular increase of the eccentricity of the orbit of
... modeling the tidal dissipation in both the Earth and the Moon was given. Later, Williams & Dickey (2003), relying upon Williams et al. (2001), yielded an anomalous eccentricity rate as large as ėmeas = (1.6 ± 0.5) × 10−11 yr−1 . Anderson & Nieto (2010) commented that eq. (1) is not compatible with ...
... modeling the tidal dissipation in both the Earth and the Moon was given. Later, Williams & Dickey (2003), relying upon Williams et al. (2001), yielded an anomalous eccentricity rate as large as ėmeas = (1.6 ± 0.5) × 10−11 yr−1 . Anderson & Nieto (2010) commented that eq. (1) is not compatible with ...
Conformal Gravity
... the Solar System and the dynamics of the Universe in total, there are still some puzzles left. When Albert Einstein introduced his theory of General Relativity in 1915 there were no measurements, which tested gravity on scales far beyond the distances of the Solar System. Therefore, as General Relat ...
... the Solar System and the dynamics of the Universe in total, there are still some puzzles left. When Albert Einstein introduced his theory of General Relativity in 1915 there were no measurements, which tested gravity on scales far beyond the distances of the Solar System. Therefore, as General Relat ...
Optical Variability of Hercules X-1/HZ Herculis
... from the other filters also show variability with the same period. To exclude any external fluctuations that could produce ’artificial’ variabilities, e.g. by the optics of the telescope itself or by other objects in the field of vision, the optical background was also analyzed with Fourier methods. ...
... from the other filters also show variability with the same period. To exclude any external fluctuations that could produce ’artificial’ variabilities, e.g. by the optics of the telescope itself or by other objects in the field of vision, the optical background was also analyzed with Fourier methods. ...
Chapter 24
... 57. Two spaceships otherwise identical use different solar sails. Sail A is a perfect absorber; sail B a perfect reflector. Compare the momentum gained by ships A and B, p A and p B , after the ships travel equal distances when each starts at the same distance from the Sun and travels in a radial ...
... 57. Two spaceships otherwise identical use different solar sails. Sail A is a perfect absorber; sail B a perfect reflector. Compare the momentum gained by ships A and B, p A and p B , after the ships travel equal distances when each starts at the same distance from the Sun and travels in a radial ...
The Milky Way: Cartoon
... Recap: Gravitational Lensing: positions of background stars will change when observed along a sight-line near a massive object. Like the sun. Observation of apparent change in star positions during a solar eclipse (when we can see close to the sun) in 1919 was a first proof of General Relativity. ...
... Recap: Gravitational Lensing: positions of background stars will change when observed along a sight-line near a massive object. Like the sun. Observation of apparent change in star positions during a solar eclipse (when we can see close to the sun) in 1919 was a first proof of General Relativity. ...
A Universe of Disks
... ly as rotation starts to balance the pull of gravity. Material along the rotation axis falls vertically toward the equatorial plane much faster. The resulting object is a rotationally supported disk. Scientists believe this process explains how protoplanetary disks form around young stars and perhap ...
... ly as rotation starts to balance the pull of gravity. Material along the rotation axis falls vertically toward the equatorial plane much faster. The resulting object is a rotationally supported disk. Scientists believe this process explains how protoplanetary disks form around young stars and perhap ...
Multiwavelength properties of γ-ray loud binary systems.
... is found in the directions of known γ-ray-loud binary systems: LSI +61 303, V407 Cyg, Cyg X-3 and PSR B1259-63. Remarkably, there are no signatures of weaker variability which could be clearly associated to other binary systems with black holes and /or neutron stars. Recent discovery of the γ-ray fl ...
... is found in the directions of known γ-ray-loud binary systems: LSI +61 303, V407 Cyg, Cyg X-3 and PSR B1259-63. Remarkably, there are no signatures of weaker variability which could be clearly associated to other binary systems with black holes and /or neutron stars. Recent discovery of the γ-ray fl ...
The Theory of Everything: The Origin and Fate of the Universe
... One may say that time had a beginning at the big bang, in the sense that earlier times simply could not be defined. It should be emphasized that this beginning in time is very different from those that had been considered previously. In an unchanging universe, a beginning in time is something that h ...
... One may say that time had a beginning at the big bang, in the sense that earlier times simply could not be defined. It should be emphasized that this beginning in time is very different from those that had been considered previously. In an unchanging universe, a beginning in time is something that h ...
Question: What is PRISM? PRISM is a space mission concept
... entire observable universe; it will, in particular, detect all galaxy clusters more massive than 5×1013 solar masses. It will also detect, via their imprint on CMB polarization, the elusive primordial gravita ...
... entire observable universe; it will, in particular, detect all galaxy clusters more massive than 5×1013 solar masses. It will also detect, via their imprint on CMB polarization, the elusive primordial gravita ...
CONTENTS - The Institute of Mathematical Sciences
... 1 Introduction Subrahmanyan Chandrasekhar started his work in General Relativity in the early 1960s. He was then past 50 years of age. In retrospect it seems historically inevitable that he should have moved over into the study of general relativity especially relativistic astrophysics. Discussing ...
... 1 Introduction Subrahmanyan Chandrasekhar started his work in General Relativity in the early 1960s. He was then past 50 years of age. In retrospect it seems historically inevitable that he should have moved over into the study of general relativity especially relativistic astrophysics. Discussing ...
Gravity, Entropy, and Cosmology: In Search of Clarity
... And we should expect the same to be true of gravity. A gravitating system differs from a non-gravitating one both because of the degrees of freedom associated with the gravitational field (i. e. , the spacetime metric) and because gravitational interactions change the dynamical properties of the sys ...
... And we should expect the same to be true of gravity. A gravitating system differs from a non-gravitating one both because of the degrees of freedom associated with the gravitational field (i. e. , the spacetime metric) and because gravitational interactions change the dynamical properties of the sys ...
Gravity, entropy, and cosmology: in search of clarity - Philsci
... And we should expect the same to be true of gravity. A gravitating system differs from a non-gravitating one both because of the degrees of freedom associated with the gravitational field (i. e. , the spacetime metric) and because gravitational interactions change the dynamical properties of the sys ...
... And we should expect the same to be true of gravity. A gravitating system differs from a non-gravitating one both because of the degrees of freedom associated with the gravitational field (i. e. , the spacetime metric) and because gravitational interactions change the dynamical properties of the sys ...
This chapter is the second on electromagnetic waves. We begin with
... Let us reconsider total internal reflection which you first learned about in Physics 212. We have an incident and reflected wave in a slow medium with n > 1. The dielectric boundary is at z=0. By Snell’s law the sin (theta_R) will be larger than sin_theta by a factor of n. But what happens if n sin ...
... Let us reconsider total internal reflection which you first learned about in Physics 212. We have an incident and reflected wave in a slow medium with n > 1. The dielectric boundary is at z=0. By Snell’s law the sin (theta_R) will be larger than sin_theta by a factor of n. But what happens if n sin ...
arXiv 2011 Feroci
... as LOFT’s will achieve very high sensitivities: a pulsed fraction of 0.8% and 0.07% will be detected at 5 σ with a 100 s observation of a 100 mCrab source and Sco X-1, respectively. The observed lack of extremely high spin frequencies (>800 Hz) in the most rapidly accreting neutron stars also sugges ...
... as LOFT’s will achieve very high sensitivities: a pulsed fraction of 0.8% and 0.07% will be detected at 5 σ with a 100 s observation of a 100 mCrab source and Sco X-1, respectively. The observed lack of extremely high spin frequencies (>800 Hz) in the most rapidly accreting neutron stars also sugges ...
"Seeing" Dark Matter
... These particular predictions are powerful, because they do not depend on assumptions about how gravity operates over cosmic distances. Since Zwicky’s original observations, astronomers have found many astronomical objects that demand far more gravity than the observed normal matter and the conventi ...
... These particular predictions are powerful, because they do not depend on assumptions about how gravity operates over cosmic distances. Since Zwicky’s original observations, astronomers have found many astronomical objects that demand far more gravity than the observed normal matter and the conventi ...
Kepler-21b: A Rocky Planet Around a V = 8.25 Mag Star
... planetary companion, Kepler-21b, with a radius of about 1.60±0.04 RÅ and an orbital period of about 2.7857 days. However, they could not determine the mass of the planet from the initial radial velocity (RV) observations with Keck-HIRES, and were only able to impose a 2σ upper limit of 10 MÅ. Here ...
... planetary companion, Kepler-21b, with a radius of about 1.60±0.04 RÅ and an orbital period of about 2.7857 days. However, they could not determine the mass of the planet from the initial radial velocity (RV) observations with Keck-HIRES, and were only able to impose a 2σ upper limit of 10 MÅ. Here ...
Gravitational Waves from 3D MHD Core
... energy of the ejecta, and it is reasonable to assume that a tiny fraction is radiated in gravitational waves (GWs). Ever since the first experimental efforts to detect GWs, CCSNe have been considered prime sources of gravitational waves for interferometric detectors. Besides neutrinos, which have al ...
... energy of the ejecta, and it is reasonable to assume that a tiny fraction is radiated in gravitational waves (GWs). Ever since the first experimental efforts to detect GWs, CCSNe have been considered prime sources of gravitational waves for interferometric detectors. Besides neutrinos, which have al ...
HEADING 1
... Knowledge and understanding of science, scientific literacy and scientific methods are necessary for students to develop the skills to resolve questions about their natural and constructed world. The purpose of science education is to develop scientific literacy, helping students: to be interested i ...
... Knowledge and understanding of science, scientific literacy and scientific methods are necessary for students to develop the skills to resolve questions about their natural and constructed world. The purpose of science education is to develop scientific literacy, helping students: to be interested i ...