نتایج جستجو برای: kepler
تعداد نتایج: 3116 فیلتر نتایج به سال:
An efficient geometric integrator is proposed for solving the perturbed Kepler motion. This method is stable and accurate over long integration time, which makes it appropriate for treating problems in astrophysics, like solar system simulations, and atomic and molecular physics, like classical simulations of highly excited atoms in external fields. The key idea is to decompose the hamiltonian ...
The Kepler conjecture asserts that no packing of congruent balls in three-dimensional Euclidean space has density greater than that of the face-centered cubic packing. The original proof, announced in 1998 and published in 2006, is long and complex. The process of revision and review did not end with the publication of the proof. This article summarizes the current status of a long-term initiat...
We construct supersymmetric(SUSY) generalized MIC-Kepler system and show that the systems with half integral Dirac quantization condition μ = ± 1 2 ,± 3 2 ,± 5 2 , ..... belong to a SUSY family (hierarchy of Hamiltonian) with same spectrum between the respective partner Hamiltonians except for the ground state. Similarly, the systems with integral Dirac quantization condition μ = ±1,±2,±3, .......
In addition to its search for extrasolar planets, the NASA Kepler mission provides exquisite data on stellar oscillations. We report the detections of oscillations in 500 solar-type stars in the Kepler field of view, an ensemble that is large enough to allow statistical studies of intrinsic stellar properties (such as mass, radius, and age) and to test theories of stellar evolution. We find tha...
The Kepler mission monitors > 100, 000 stellar targets using 42 2200×1024 pixel CCDs. Bandwidth constraints prevent the downlink of all 96 million pixels per 30-minute cadence, so the Kepler spacecraft downlinks a specified collection of pixels for each target. These pixels are selected by considering the object brightness, background and the signal-to-noise of each pixel, and are optimized to ...
We analyze frictionaly damped orbits in central potentials. When the potential is a monomial in the radius, the orbit shape and precession angle remain constant to leading order in the linear friction coefficient. This is not a consequence of any obvious symmetry, but for motion in the Kepler potential may be understood in terms of the generalization of Poisson structure to damped systems sugge...
The advent of space-based photometry missions such as CoRoT, Kepler and TESS has sparkled the development asteroseismology exoplanetology. PLATO will further strengthen multi-disciplinary studies. Testing asteroseismic modelling its importance for our understanding planetary systems is crucial. We carried out a detailed Kepler-93, an exoplanet host star observed by Kepler. This particularly int...
The story that we present tries to take readers on a journey of technological marvel, and attempts to show a little view of what the future can be like. After all, the sky's the ceiling, and we are far from our limits. Our story develops the action in the Earth and mention Kepler 4b and Kepler 7B planets to show that distances there are not a problem anymore and everybody can travel from one pl...
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