SOFA Astrometry Tools

... the α zero-point the kinematically-defined celestial intermediate origin (CIO). In this system, hour angle h is related to right ascension through the local Earth rotation angle: h = θ − α, where θ is ERA + λ and λ is longitude (east positive). The classical system, also supported by the SOFA routin ...

... the α zero-point the kinematically-defined celestial intermediate origin (CIO). In this system, hour angle h is related to right ascension through the local Earth rotation angle: h = θ − α, where θ is ERA + λ and λ is longitude (east positive). The classical system, also supported by the SOFA routin ...

Vibrating Rays Theory arXiv:1407.5001v8

... of light compared to the Second Postulate while at the same time, there are many experiments on time dilatation that are consistent with SRT to second order in v/c (see, for example, [21])?; 5. Assuming that surveillance radars are well calibrated, the measured range difference would be due to a def ...

... of light compared to the Second Postulate while at the same time, there are many experiments on time dilatation that are consistent with SRT to second order in v/c (see, for example, [21])?; 5. Assuming that surveillance radars are well calibrated, the measured range difference would be due to a def ...

Reconsidering Maxwell`s aether

... function is not to be considered as physical, but as a mathematical object from which the possible results of experiments and their relative probabilities can be deduced.” [Emphasis added] Bryan Cox and Jeff Forshaw, The Quantum Universe:6 “…any explanation of the double-slit experiment requires tha ...

... function is not to be considered as physical, but as a mathematical object from which the possible results of experiments and their relative probabilities can be deduced.” [Emphasis added] Bryan Cox and Jeff Forshaw, The Quantum Universe:6 “…any explanation of the double-slit experiment requires tha ...

The Two Kinds of Electric Charge

... when we consider the convective force of the general form v×H, with v being velocity and H being vorticity. Maxwell explains this as being a result of differential centrifugal pressure from the tiny vortices, pressing unevenly on an object or an element of electric current. There can be no other pos ...

... when we consider the convective force of the general form v×H, with v being velocity and H being vorticity. Maxwell explains this as being a result of differential centrifugal pressure from the tiny vortices, pressing unevenly on an object or an element of electric current. There can be no other pos ...

Einstein`s Special Theory of Relativity and the Problems in the

... Einstein in the opening section of his 1905 paper. The first is the principle of relativity. It just asserts that the laws of physics hold equally in every inertial frame of reference.5 That means that any process that can occur in one frame of reference according to these laws can also occur in any ...

... Einstein in the opening section of his 1905 paper. The first is the principle of relativity. It just asserts that the laws of physics hold equally in every inertial frame of reference.5 That means that any process that can occur in one frame of reference according to these laws can also occur in any ...

Einsteinʼs Special Theory of Relativity and the Problems in the

... outcome. The best such an experiment can reveal is motion with respect to some other frame; but it cannot license the assertion that one is absolutely at rest and the other is in true motion. While not present by name, the principle of relativity has always been an essential part of Newtonian physi ...

... outcome. The best such an experiment can reveal is motion with respect to some other frame; but it cannot license the assertion that one is absolutely at rest and the other is in true motion. While not present by name, the principle of relativity has always been an essential part of Newtonian physi ...

19th Century Ether Theory.1

... illustrated in the drawing on the right. The orbit of the earth has been shrunk to a point to indicate that the star is so far away that its parallax is unobservable. The arrows labeled 1 through 4 represent the earth’s velocity at the points of the earth’s orbit labeled 1 through 4 in the drawing ...

... illustrated in the drawing on the right. The orbit of the earth has been shrunk to a point to indicate that the star is so far away that its parallax is unobservable. The arrows labeled 1 through 4 represent the earth’s velocity at the points of the earth’s orbit labeled 1 through 4 in the drawing ...

CHAPTER 2: Special Theory of Relativity

... prediction of Maxwell’s equation, all the rest of Maxwell’s electrodynamics is also invariant to these transformations; and sure enough, also account for the apparent problem of simultaneity of events as observed from different inertial frames of reference ...

... prediction of Maxwell’s equation, all the rest of Maxwell’s electrodynamics is also invariant to these transformations; and sure enough, also account for the apparent problem of simultaneity of events as observed from different inertial frames of reference ...

Spinning Earth and its Coriolis effect on the circuital light beams

... polar orbit around Earth, in the orbital plane of the gyroscope, each inﬁnitesimal mass element on the body of the gyroscope, at each instant will tend to move in a direction different from the constrained direction of movement of the centre of the gyroscope due to the new momentum eq. (14). This wi ...

... polar orbit around Earth, in the orbital plane of the gyroscope, each inﬁnitesimal mass element on the body of the gyroscope, at each instant will tend to move in a direction different from the constrained direction of movement of the centre of the gyroscope due to the new momentum eq. (14). This wi ...

Does Light Travel with the Velocity of a Moving Source?

... c. However, many dissident physicists, as well as myself (though not a physicist, but a nuclear engineer with a keen interest in physics), question relativity, and a key point of contention appears to be whether or not light travels with the velocity of its source, thereby enabling it to propagate f ...

... c. However, many dissident physicists, as well as myself (though not a physicist, but a nuclear engineer with a keen interest in physics), question relativity, and a key point of contention appears to be whether or not light travels with the velocity of its source, thereby enabling it to propagate f ...

PPT

... • Both types of transformation are invertible: if you transform to a primed frame using relative velocity v, then transform using relative velocity -v, you get back the original coordinates. That's obvious for Galilean transforms, and you can easily check it for Lorentz transforms. That's one of the ...

... • Both types of transformation are invertible: if you transform to a primed frame using relative velocity v, then transform using relative velocity -v, you get back the original coordinates. That's obvious for Galilean transforms, and you can easily check it for Lorentz transforms. That's one of the ...

physics space notes File

... Isaac Newton was the first to propose that objects could be projected from the earth and placed into orbit around the planet. He suggested that such a projectile would have to be launched horizontally from the top of a very high mountain. He argued that as the launch velocity was increased, the dist ...

... Isaac Newton was the first to propose that objects could be projected from the earth and placed into orbit around the planet. He suggested that such a projectile would have to be launched horizontally from the top of a very high mountain. He argued that as the launch velocity was increased, the dist ...

PPT

... Something is frustrating: we have all sorts of experiments that fit a theory that says that Maxwell's equations only work in a special frame- but somehow we can't quite measure our motion with respect to that frame, can’t even tell if we’re at rest in that frame. • Even worse, there was a major para ...

... Something is frustrating: we have all sorts of experiments that fit a theory that says that Maxwell's equations only work in a special frame- but somehow we can't quite measure our motion with respect to that frame, can’t even tell if we’re at rest in that frame. • Even worse, there was a major para ...

Coordinate Systems for Astronomy or: How to get

... Standard Time (SAST) is set to be 2 hours ahead of UTC. Our “year” is technically the Earth's “tropical period”. This is the time that elapses between two alignments of its axis of rotation with the Sun, or 365.242 days. The Earth's orbital (sidereal) period around the Sun is 365.256 days. The 0.014 ...

... Standard Time (SAST) is set to be 2 hours ahead of UTC. Our “year” is technically the Earth's “tropical period”. This is the time that elapses between two alignments of its axis of rotation with the Sun, or 365.242 days. The Earth's orbital (sidereal) period around the Sun is 365.256 days. The 0.014 ...

01. Survey of Pre-20th Century Physics

... Law I. Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it. • Describes natural motion ("kinematics") for Newton: uniform motion (rest or constant velocity) in a straight line. • Referred to as The P ...

... Law I. Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it. • Describes natural motion ("kinematics") for Newton: uniform motion (rest or constant velocity) in a straight line. • Referred to as The P ...

Parallax and Aberration - Berry College Professional WordPress Sites

... In 1674 Hooke published his results and claimed to have detected annual parallax.5 Although he gave a detailed discussion of his careful measurement procedure, he presented only four observations. Problems with the telescope and his own health prevented him from continuing the work. Hooke’s data are ...

... In 1674 Hooke published his results and claimed to have detected annual parallax.5 Although he gave a detailed discussion of his careful measurement procedure, he presented only four observations. Problems with the telescope and his own health prevented him from continuing the work. Hooke’s data are ...

Module 6

... The last case we examine is when the observed angle is 90. It is impossible for the observed angle to have this value for more than an instant if the source moves with a constant velocity to the right as we have been considering. The angle would be 90 only when the source is directly below the obs ...

... The last case we examine is when the observed angle is 90. It is impossible for the observed angle to have this value for more than an instant if the source moves with a constant velocity to the right as we have been considering. The angle would be 90 only when the source is directly below the obs ...

ph512-11-lec5

... Aberration Observations from a moving platform (all observations) suffer aberration in the arrival direction of starlight, due to the finite speed of light (a.k.a. the umbrella effect). To high accuracy, if we look at an angle θ to the instantaneous motion with respect to some constant reference fra ...

... Aberration Observations from a moving platform (all observations) suffer aberration in the arrival direction of starlight, due to the finite speed of light (a.k.a. the umbrella effect). To high accuracy, if we look at an angle θ to the instantaneous motion with respect to some constant reference fra ...

Seeing Earth`s Orbit in the Stars: Parallax and Aberration

... be aimed directly up toward the star. It must be tilted slightly toward the direction of the telescope’s motion. This phenomenon is now called the aberration of starlight. Applying trigonometry to ...

... be aimed directly up toward the star. It must be tilted slightly toward the direction of the telescope’s motion. This phenomenon is now called the aberration of starlight. Applying trigonometry to ...

Scribe notes 10/3 - Google Docs

... ● Scientists tried to detect the medium through which light travels - “ether” ○ (failed to find this) ● Relativity (Einstein's) concludes that this is not a problem E6: ● Person A is on a train moving at a uniform velocity, and throws an object at a speed of w ● Person B is on an embankment ○ A sees ...

... ● Scientists tried to detect the medium through which light travels - “ether” ○ (failed to find this) ● Relativity (Einstein's) concludes that this is not a problem E6: ● Person A is on a train moving at a uniform velocity, and throws an object at a speed of w ● Person B is on an embankment ○ A sees ...

1-A swimmer wants to swim straight across a river with

... comparable to the speed of light c, to make a round trip within 30 years. Then in 15 years, it will travel a distance of 15 light years to reach the planet and in next 15 years, it will come back, traveling again 15 light years. Thus the rocket must travel a distance of 1 light year in 1 year. But 1 ...

... comparable to the speed of light c, to make a round trip within 30 years. Then in 15 years, it will travel a distance of 15 light years to reach the planet and in next 15 years, it will come back, traveling again 15 light years. Thus the rocket must travel a distance of 1 light year in 1 year. But 1 ...

Catalano and Roskos on Maxwell`s Theory

... propagates at a fixed speed through a vacuum which makes aether stationary Thus all things are moving through the “still” ether, although the aether does have directionality ...

... propagates at a fixed speed through a vacuum which makes aether stationary Thus all things are moving through the “still” ether, although the aether does have directionality ...

Light Time Delay - AGI - Analytical Graphics, Inc.

... observers will measure the speed of light (in vacuum) as the same constant value c. Space is no longer separable from time; space-time is not a Euclidean space but instead a Minkowski space. Concepts that were once trivial now become more complicated: different inertial observers now disagree on sim ...

... observers will measure the speed of light (in vacuum) as the same constant value c. Space is no longer separable from time; space-time is not a Euclidean space but instead a Minkowski space. Concepts that were once trivial now become more complicated: different inertial observers now disagree on sim ...

Astronomical co-ordinates

... 1B11 Precession and Nutation • Precession occurs due to the gravitational pull of the Sun and the Moon (mostly the Moon). • Over 26,000 years, the positions of the celestial poles and the equinoxes change with respect to the stars. • Thus it is always necessary to specify a date for equatorial co-o ...

... 1B11 Precession and Nutation • Precession occurs due to the gravitational pull of the Sun and the Moon (mostly the Moon). • Over 26,000 years, the positions of the celestial poles and the equinoxes change with respect to the stars. • Thus it is always necessary to specify a date for equatorial co-o ...

# Aberration of light

The aberration of light (also referred to as astronomical aberration or stellar aberration) is an astronomical phenomenon which produces an apparent motion of celestial objects about their locations dependent on the velocity of the observer. Aberration causes objects to appear to be angled or tilted towards the direction of motion of the observer compared to when the observer is stationary. The change in angle is typically very small, on the order of v/c where c is the speed of light and v the velocity of the observer. In the case of ""stellar"" or ""annual"" aberration, the apparent position of a star to an observer on Earth varies periodically over the course of a year as the Earth's velocity changes as it revolves around the Sun, by a maximum angle of approximately 20 arcseconds in right ascension or declination.Aberration is historically significant because of its role in the development of the theories of light, electromagnetism and, ultimately, the theory of special relativity. It was first observed in the late 1600s by astronomers searching for stellar parallax in order to confirm the heliocentric model of the Solar System, much to their surprise. In 1729, James Bradley provided a classical explanation for it in terms of the finite speed of light relative to the motion of the Earth in its orbit around the Sun, which he used to make one of the earliest measurements of the speed of light. However, Bradley's theory was incompatible with 19th century theories of light, and aberration became a major motivation for the aether drag theories of Augustin Fresnel (in 1818) and G. G. Stokes (in 1845), and for Hendrick Lorentz' aether theory of electromagnetism in 1892. The aberration of light, together with Lorentz' elaboration of Maxwell's electrodynamics, the moving magnet and conductor problem, the negative aether drift experiments, as well as the Fizeau experiment, led Albert Einstein to develop the theory of special relativity in 1905, which provided a conclusive explanation for the aberration phenomenon.The term 'aberration' has historically been used to refer to a number of related phenomena concerning the propagation of light in moving bodies. Aberration should not be confused with stellar parallax. The latter is caused by a change in the position of the observer looking at a relatively nearby object (theoretically, at any object outside the Solar System); the former is related to light-time correction and relativistic beaming, although it is often considered separately from these effects.The term aberration may also be used to refer to unrelated phenomena in optical systems — optical aberration.