نتایج جستجو برای: eccentric orbits
تعداد نتایج: 24838 فیلتر نتایج به سال:
Observations of exoplanets have revealed that systems with planets on closely-spaced orbits are common, which motivates the question “How closely can orbit to one another and still be dynamically-stable for very long times?”. To address this question, we investigate stability idealized planetary consisting five planets, each equal in mass Earth, orbiting a solar star. All same plane direction, ...
The obliquity of a star, or the angle between its spin axis and average orbit normal companion planets, provides unique constraint on that system's evolutionary history. Unlike Solar System, where Sun's equator is nearly aligned with many hot Jupiter systems have been discovered large spin-orbit misalignments, hosting planets polar retrograde orbits. We demonstrate that, in contrast to stars ha...
evaporation. Taking the mean density and Bond albedo of a typical Vulcanoid to be the same as that of Mercury, we ®nd that objects with radii z satisfying 0:1 ( z ( 50 km can evade both drag and evaporation in the Vulcanoid belt. This is one of the most dynamically stable regimes in the entire Solar System. If further searches do not detect any intra-mercurial objects, this is a strong indicato...
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