Shepherd of the Planets
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Featured author. Alex "Sandy" Pentland. Latest book. Towards a New Enlightenment? A Transcendent Decade. Science Physics. Astrophysics Physics Space Universe. Ventana al Conocimiento Knowledge Window. Estimated reading time Time 4 to read. Los anillos de Urano se descubrieron en Arizona In the Voyager 2 space probe sent the first close-up images of these rings , which are believed to be million years old, which in astronomical time is very recent.
Liberty, Equality and Fraternity on Neptune The last of the planets of the solar system has very dark rings, ethereal and faint , which we discovered in thanks to the Voyager 2 probe. Do you want to stay up to date with our new publications? Receive the OpenMind newsletter with all the latest contents published on our website Find out more here. Comments on this publication Login to comment Log in Subscribe.
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Newsletter Keep up to date with our newsletter. It must be exceptionally thin and have a sharp cutoff both on the interior and exterior edges.
follow If the previously claimed planet, Fomalhaut b, were the only one present, it could not account for the outer edge of the disk being sharply truncated as well as the inner edge. Another possibility is that the ring is simply newly formed as the result of a collision between two planets and has not yet had time to dissipate giving it the sharp appearance.
Since neither of these explanations are sufficient, the team proposes that there are two planets that shepherd the ring: One interior and one exterior to it. By varying the mass of hypothetical planets in the models, the authors could create a ring similar to that seen around Fomalhaut. However, the best fit was created by a pair of planets that were less than three times the mass of the Earth which would mean that the proposed mass for Fomalhaut b was significantly too high, further casting doubt on its existence.
Additionally, the proposed orbit of Fomalhaut bwas 10 AU off from the orbit of the hypothetical interior shepherd planet. Ultimately, these two planets are only hypothetical. Detecting them in a more direct fashion will prove challenging. Given the low proposed mass and the distance, they would reflect too little light to be able to be directly observed with current telescopes. A sharp-edged disk of fine dust, cause still undetectable? Bordering shepherding planets only hypothetical?