Development of Gravity Theories in the View of TRAPPIST-1e

Contrary to the solar system, most exoplanet systems detected hitherto are close-in and compact. One typical system is TRAPPIST-1, which has seven nearly co-planar terrestrial planets all within the orbit of Mercury, including three in the habitable zone. To evaluate the differences in development o...

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Published in:Research in astronomy and astrophysics 2024-11
Main Authors: Wang, Nan, Lu, Lu-Yao, Liu, Hui-Gen, Chen, An-Dong, Lu, Tiger, Cui, Ao-Ran, Wang, Jun-Kai
Format: Article
Language:English
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Summary:Contrary to the solar system, most exoplanet systems detected hitherto are close-in and compact. One typical system is TRAPPIST-1, which has seven nearly co-planar terrestrial planets all within the orbit of Mercury, including three in the habitable zone. To evaluate the differences in development of sophisticated gravity theories from the solar system, we use N-body integrations to simulate ephemeris and reproduce some important astronomy phenomena observed on the potentially habitable planet TRAPPIST-1e. Retrograde motions of other planets last 1–2 orders of magnitude shorter than in the solar system, but occur much more frequently. Transit events of all inner planets can be observed steadily. Except Kepler's first law is hard to notice for low eccentricities of planets, the other two laws can then be precisely verified in 10 2 days, because the areas swept by planets vary by
ISSN:1674-4527
DOI:10.1088/1674-4527/ad9254