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Spherical orbits around Kerr–Newman and Ghosh black holes
We conduct a comprehensive study on spherical orbits around two types of black holes: Kerr–Newman black holes, which are charged, and Ghosh black...
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Spherical photon orbits around a rotating black hole with quintessence and cloud of strings
In this paper, we calculate the analytical solutions for the radii of planar and polar spherical photon orbits around a rotating black hole that is...
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Spherical orbits around a Kerr black hole
A special class of orbits known to exist around a Kerr black hole are spherical orbits—orbits with constant coordinate radii that are not necessarily...
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Selecting orbits for Earth observations
Selecting orbits for a satellite to observe the Earth is a very important task in aerospace engineering. There are several constraints to be...
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Analysis of the natural orbits around Io
The natural satellite of Jupiter, Io, is one of the most interesting bodies in the solar system and deserves to be studied in detail. Up to now, no...
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Analytical investigation about long-lifetime science orbits around Galilean moons
It is desirable to design low-altitude and near-polar science orbits for missions to Galilean moons. However, the long-term perturbation from a...
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Searching for orbits to observe Iapetus
It is in the interest of astronomy and engineering to find orbits for spacecraft that allow a good observation of the orbited body and, at the same...
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Timelike bound orbits and pericenter precession around black hole with conformally coupled scalar hair
We investigate the geodesic motions of timelike particles around a static hairy black hole with conformally coupled scalar field. We mainly focus on...
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Three-body periodic collisionless equal-mass free-fall orbits revisited
Li and Liao announced (New Astron 70:22–26, 2019, ar**v:1805.07980v1 ) discovery of 313 periodic collisionless orbits’ initial conditions (i.c.s), 30...
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Precessing and periodic timelike orbits and their potential applications in Einsteinian cubic gravity
Einsteinian cubic gravity (ECG) is the most general theory up to cubic order in curvature, which has the same graviton spectrum as the Einstein...
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Manifestly covariant worldline actions from coadjoint orbits. Part I. Generalities and vectorial descriptions
We derive manifestly covariant actions of spinning particles starting from coadjoint orbits of isometry groups, by using Hamiltonian reductions. We...
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Fundamental photon orbits in the double Schwarzschild space-time
We consider photon orbits in the space-time consisting of two identical Schwarzschild black holes in static equilibrium. In particular, we focus on...
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Analysing orbits around the Moon for the Garatéa-L Mission
Recently, we have seen a series of space missions to the Moon and asteroids, whether for exploratory or scientific purposes, with possibilities of a...
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Metrics on space of closed orbits for near-Earth objects identification
In the characterization of the space debris environment, the computation of the orbit of the debris objects is usually conducted by considering the...
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Satellites’ orbits in the Sun–Earth–Moon system
There is a large set of papers and monographs which consider the restricted three-body problem and apply the results to the orbits of satellites or...
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Quantum spherical codes
As with classical computers, quantum computers require error-correction schemes to reliably perform useful large-scale calculations. The nature and...
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Gravitational orbits, double-twist mirage, and many-body scars
We explore the implications of stable gravitational orbits around an AdS black hole for the boundary conformal field theory. The orbits are...
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Satellite transfers between Keplerian orbits
We introduce a new technique for satellite transfers between Keplerian orbits. This new technique is based on controlling the constants of motion of...
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Design and analysis of quasi-halo orbits and optimal transfers from the Earth under different Sun–Earth frameworks using differential evolution
In general, the initial designs of periodic orbits around the Lagrangian points and transfers to them from the Earth are generated under the Circular...
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