Reconnaissance Orbits Normal to the Ecliptic Plane

1961 ◽  
Vol 65 (606) ◽  
pp. 436-437
Author(s):  
S. W. Greenwood
Keyword(s):  
Extreme Case ◽  
Ecliptic Plane ◽  
The Sun ◽  
The Earth ◽  
Previous Note

The ecliptic plane is the plane of the orbit of the Earth round the Sun. In a previous note the velocity requirements were examined for conventional rocket vehicles to enter reconnaissance orbits around the Sun in this plane.Departure from the ecliptic plane obviously involves an increase in the velocity requirement. To some extent, all interplanetry voyages necessitate such motion, as the planets lie in planes inclined to the ecliptic. In this note, the extreme case of entry into orbits normal to the ecliptic will be considered.

scholarly journals Methods to Test the “Dimming Effect” Produced by a Decrease in the Number of Photons Received from Receding Light Sources

2020 ◽  
Author(s):  
Mark Zilberman
Keyword(s):  
Light Source ◽  
Opposite Direction ◽  
Ecliptic Plane ◽  
Light Sources ◽  
The Sun ◽  
Decimal Point ◽  
Relativistic Systems ◽  
The Earth ◽  
New Models ◽  
Direction Opposite

The hypothetical “Dimming Effect” describes the change of the number of photons arriving from a moving light source per unit of time. In non-relativistic systems, the “Dimming effect” may occur due to the growing distance of light sources moving away from the receiver. This means that due to the growing distance, the photons continuously require more time to reach the receiver, which reduces the number of received photons per time unit compared to the number of emitted photons. Understandably, the proposed “Dimming effect” must be tested (confirmed or rejected) through observations. a. This article provides the formula for the calculation of “Dimming effect” values using the redshift parameter Z widely used in astronomy. b. The “Dimming effect” can possibly be detected utilizing the orbital movement of the Earth around the Sun. In accordance to the “Dimming effect”, observers on Earth will view 1.0001 more photons per time unit emitted by stars located near the ecliptic plane in the direction of the Earth orbiting the Sun. And, in contrast, observers will view only 0.9999 photons per time unit emitted by stars located near the ecliptic plane in the direction opposite to the Earth orbiting the Sun. Calculating precise measurements of the same stars within a 6-month period can possibly detect this difference. These changes in brightness are not only for specific stars, as the change in brightness takes place for all stars near the ecliptic in the direction of the Earth’s orbit around the Sun and in the opposite direction. c. The “Dimming effect” can possibly be detected in a physics laboratory using a moving light source (or mirror) and photon counters located in the direction of travel and in the opposite direction. d. In theory, Dilation of time can also be used for testing the existence of the “Dimming effect.” However, in experiments on Earth this effect appears in only the 14th digit after the decimal point and testing does not appear to be feasible. e. Why is it important to test the “Dimming effect?” If confirmed, it would allow astronomers to adjust values of "Standard Candles" used in astronomy. Since “Standard Candles” are critical in various cosmological models, the “Dimming effect” can correct models and/or reveal and support new models. If it is proved that the “Dimming effect” does not exist, it will mean that the number of photons arriving per unit of time does not depend on the speed of the light source and observer, which is not so apparent.

scholarly journals The Visibility of Earth Transits

2004 ◽  
Vol 202 ◽  
pp. 445-447 ◽  
Author(s):  
T. Castellano ◽  
L. Doyle ◽  
D. McIntosh
Keyword(s):  
Laboratory Experiments ◽  
Ecliptic Plane ◽  
Solar Neighborhood ◽  
Geometric Condition ◽  
The Sun ◽  
Intrinsic Variability ◽  
Noise Sources ◽  
Photometric Detection ◽  
The Earth ◽  
Order Of Magnitude

The recent photometric detection of planetary transits of the solar-like star HD 209458 at a distance of 47 parsecs suggest that transits can reveal the presence of Jupiter-size planetary companions in the solar neighborhood (Charbonneau et al. 2000; Henry et al. 2000). Recent space-based transit searches have achieved photometric precision within an order of magnitude of that required to detect the much smaller transit signal of an earth-size planet across a solar-size star. Laboratory experiments in the presence of realistic noise sources have shown that CCDs can achieve photometric precision adequate to detect the 9.6 E-5 dimming of the Sun due to a transit of the Earth (Borucki et al. 1997; Koch et al. 2000). Space-based solar irradiance monitoring has shown that the intrinsic variability of the Sun would not preclude such a detection (Borucki, Scargle, Hudson 1985). Transits of the Sun by the Earth would be detectable by observers that reside within a narrow band of sky positions near the ecliptic plane, if the observers possess current Earth epoch levels of technology and astronomical expertise. A catalog of solar-like stars that satisfy the geometric condition for Earth transit visibility are presented.

scholarly journals Libration of the Moon: shape of the Earth and motion of the ecliptic plane

1986 ◽  
Vol 114 ◽  
pp. 141-144
Author(s):  
M. Moons
Keyword(s):  
Gravity Field ◽  
Spherical Harmonics ◽  
Fourth Order ◽  
Center Of Mass ◽  
Ecliptic Plane ◽  
The Sun ◽  
Lunar Gravity ◽  
The Moon ◽  
Lunar Gravity Field ◽  
The Earth

Very accurate theories of the libration of the Moon have been recently built by Migus (1980), Eckhardt (1981, 1982) and Moons (1982, 1984). All of them take into account the perturbation due to the Earth and the Sun on the motion of a rigid Moon about its center of mass. Additional perturbations (influence of the planets, shape of the Earth, elasticity of the Moon, …) are also often included.We present here the perturbations due to the shape of the Earth and the motion of the ecliptic plane on our theory which already contains planetary perturbations. This theory is completely analytical with respect to the harmonic coefficients of the lunar gravity field which is expanded in spherical harmonics up to the fourth order. The ELP 2000 solution (Chapront and Chapront-Touzé, 1983) supplies us with the motion of the center of mass of the Moon.

scholarly journals Everything Is A Circle: A New Universal Orbital Model

2021 ◽  
Author(s):  
AslıPınar Tan
Keyword(s):  
Solar System ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Ecliptic Plane ◽  
The Sun ◽  
The Moon ◽  
Circular Orbits ◽  
Orbital Parameters ◽  
The Earth ◽  
Angular Velocities

Based on measured astronomical position data of heavenly objects in the Solar System and other planetary systems, all bodies in space seem to move in some kind of elliptical motion with respect to each other. According to Kepler’s 1st Law, “orbit of a planet with respect to the Sun is an ellipse, with the Sun at one of the two foci.” Orbit of the Moon with respect to Earth is also distinctly elliptical, but this ellipse has a varying eccentricity as the Moon comes closer to and goes farther away from the Earth in a harmonic style along a full cycle of this ellipse. In this paper, our research results are summarized, where it is first mathematically shown that the “distance between points around any two different circles in three dimensional space” is equivalent to the “distance of points around a vector ellipse to another fixed or moving point, as in two dimensional space”. What is done is equivalent to showing that bodies moving on two different circular orbits in space vector wise behave as if moving on an elliptical path with respect to each other, and virtually seeing each other as positioned at an instantaneously stationary point in space on their relative ecliptic plane, whether they are moving with the same angular velocity, or different but fixed angular velocities, or even with different and changing angular velocities with respect to their own centers of revolution. This mathematical revelation has the potential to lead to far reaching discoveries in physics, enabling more insight into forces of nature, with a formulation of a new fundamental model regarding the motions of bodies in the Universe, including the Sun, Planets, and Satellites in the Solar System and elsewhere, as well as at particle and subatomic level. Based on the demonstrated mathematical analysis, as they exhibit almost fixed elliptic orbits relative to one another over time, the assertion is made that the Sun, the Earth, and the Moon must each be revolving in their individual circular orbits of revolution in space. With this expectation, individual orbital parameters of the Sun, the Earth, and the Moon are calculated based on observed Earth to Sun and Earth to Moon distance data, also using analytical methods developed as part of this research to an approximation. This calculation and analysis process have revealed additional results aligned with observation, and this also supports our assertion that the Sun, the Earth, and the Moon must actually be revolving in individual circular orbits.

scholarly journals Gravity of The Sun, The Main Force Operating That Changes The Location of The Earth’s Axis of The Earth’s Mantle And, Accordingly, The Location of The Equator

2020 ◽  
pp. 188-191
Keyword(s):  
Ecliptic Plane ◽  
Earth’S Rotation ◽  
The Sun ◽  
Earth's Rotation ◽  
Earth’S Mantle ◽  
The Earth ◽  
Main Thing ◽  
A Minor ◽  
Minor Extent

The force of gravity of the sun on the earth, when the axis of the earth is found at a specific angle towards the sun in the summer and the winter, moves the earth’s mantle, including the axis of the earth’s rotation. This force is the main thing that changes the location of the axis of the earth’s rotation on the mantle of the earth and, to a minor extent or not at all, causes a change in the angle of the earth’s rotation in relation to the sun, and to the earth’s ecliptic plane.

scholarly journals Methods to Test the “Dimming Effect” Produced by a Decrease in the Number of Photons Received from Receding Light Sources

2020 ◽  
Author(s):  
M. Zilberman
Keyword(s):  
Light Source ◽  
Ecliptic Plane ◽  
Cosmological Models ◽  
Light Sources ◽  
The Sun ◽  
Decimal Point ◽  
Relativistic Systems ◽  
The Earth ◽  
New Models ◽  
Direction Opposite

Abstract The hypothetical “Dimming Effect” describes the change of the number of photons arriving from a moving light source per unit of time. In non-relativistic systems, the “Dimming effect” may occur due to the growing distance of light sources moving away from the receiver. This means that due to the growing distance, the photons continuously require more time to reach the receiver, which reduces the number of received photons per time unit compared to the number of emitted photons.Understandably, the proposed “Dimming effect” must be tested (confirmed or rejected) through observations.a. This article provides the formula for the calculation of “Dimming effect” values using the redshift parameter Z widely used in astronomy.b. The “Dimming effect” can possibly be detected utilizing the orbital movement of the Earth around the Sun. In accordance to the “Dimming effect”, observers on Earth will view 1.0001 more photons per time unit emitted by stars located near the ecliptic plane in the direction of the Earth orbiting the Sun. And, in contrast, observers will view only 0.9999 photons per time unit emitted by stars located near the ecliptic plane in the direction opposite to the Earth orbiting the Sun. Calculating precise measurements of the same stars within a 6-month period can possibly detect this difference. These changes in brightness are not only for specific stars, as the change in brightness takes place for all stars near the ecliptic in the direction of the Earth’s orbit around the Sun and in the opposite direction.c. The “Dimming effect” can possibly be detected in a physics laboratory using a moving light source (or mirror) and photon counters located in the direction of travel and in the opposite direction.d. In theory, Dilation of time can also be used for testing the existence of the “Dimming effect.” However, in experiments on Earth this effect appears in only the 14th digit after the decimal point and testing does not appear to be feasible.e. Why is it important to test the “Dimming effect?”* If confirmed, it would allow astronomers to adjust values of "Standard Candles" used in astronomy. Since “Standard Candles” are critical in various cosmological models, the “Dimming effect” can correct models and/or reveal and support new models.* If it is proved that the “Dimming effect” does not exist, it will mean that the number of photons arriving per unit of time does not depend on the speed of the light source and observer, which is not so apparent.

Basic Solar and Planetary Properties

2017 ◽  
Author(s):  
Kelly Chance ◽  
Randall V. Martin
Keyword(s):  
Solar Cycle ◽  
Solar System ◽  
Spectral Reflectance ◽  
Extrasolar Planets ◽  
Ecliptic Plane ◽  
Planetary Atmospheres ◽  
Hydrostatic Equilibrium ◽  
Atmospheric Composition ◽  
The Sun ◽  
The Earth

Basic properties of the Sun, the Earth and its atmosphere, other solar system atmospheres, and extrasolar planetary atmospheres are introduced here to provide background and context for the detailed study of the spectroscopy and radiative transfer of planetary atmospheres. Solar structure is described, including the solar cycle and variability, and a reference solar irradiance is presented. The Earth’s orbit, the seasons, and the ecliptic plane are introduced. The properties of hydrostatic equilibrium, albedo, and spectral reflectance are described. Earth’s atmospheric composition, including aerosols and gases, is summarized. Other atmospheres in the solar system are described and the growing field of extrasolar planets detection and characterization introduced.

Resonance in the Motion of Geocentric Satellites due to Poynting-Robertson Drag

2018 ◽  
Vol 10 (1) ◽  
Author(s):  
Charanpreet Kaur ◽  
Binay Kumar Sharma ◽  
M. Shahbaz Ullah
Keyword(s):  
Angular Velocity ◽  
Orbital Plane ◽  
Ecliptic Plane ◽  
The Sun ◽  
Gravitational Forces ◽  
The Earth ◽  
Time Period ◽  
The Subject ◽  
The Mean ◽  
Two Bodies

The problem of resonance in a geocentric synchronous satellite under the gravitational forces of the Sun and the Earth subject to Poynting-Robertson (P-R) drag is the subject matter of this paper. Based on the assumption that the two bodies the Earth and the Sun lie in ecliptic plane and the satellite in the orbital plane. Five resonance points results from commensurability between the mean motion of the satellite and the average angular velocity of the Earth. Out of all resonance, the 3:2 and 1:2 resonance occurs only due to velocity dependent terms of P-R drag. We have determined the amplitude and time period of the oscillation in two different cases at those resonance points.

A survey of the X-ray sky with HEAO A-1

1979 ◽  
Vol 366 (1726) ◽  
pp. 423-434 ◽  
Keyword(s):  
Ecliptic Plane ◽  
High Energy ◽  
Astronomical Observatory ◽  
The Sun ◽  
Source Detection ◽  
X Ray ◽  
The Earth ◽  
Effective Aperture ◽  
Ecliptic Latitude ◽  
Primary Mission

The primary mission of the A-1 instrument aboard the first N. A. S. A. High Energy Astronomical Observatory (HEAO) is to enlarge the catalogue of X-ray sources to about 1000. Seven modules of X-ray proportional counters, having an average effective aperture of about 1700 cm 2 apiece, cover an energy range from 0.25 keV to about 25 keV. Full sky coverage is obtained by spinning the spacecraft at 2 rev. h -1 about the direction to the Sun. The detectors view the sky at right angles to the spin axis, so that 48 great circle sweeps normal to the ecliptic plane are completed each day. As the Earth carries the spacecraft around the Sun, the scan plane rotates 1° in ecliptic latitude each day. The basic scan is obtained with four modules having 1° x 4° collimation, giving 10000 resolution elements on the full sky. Assuming one source detection for every ten resolution elements, the survey should detect about 1000 sources.

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