Astronomers Spot Rare Exoplanet System with Rapidly Changing Orbits
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\nAstronomers have discovered a highly unusual planetary system around the star TOI\u2011201, located about 370 light\u2011years from Earth, where the orbits of its planets are evolving swiftly \u2014 a phenomenon rarely seen in real time.<\/p>\n
The finding was made using data from NASA\u2019s Transiting Exoplanet Survey Satellite (TESS) and follow\u2011up observations from the Antarctic Search for Transiting ExoPlanets (ASTEP) at Antarctica\u2019s Concordia Station.<\/p>\n
The star TOI\u2011201 is slightly larger and more massive than the Sun, with about 1.3 times the Sun\u2019s mass and diameter. Researchers identified three distinct worlds orbiting the star, namely:<\/p>\n
TOI\u2011201 d: a rocky \u201csuper\u2011Earth\u201d roughly six times the mass of Earth, completing an orbit every 5.85 days.
\nTOI\u2011201 b: a \u201cwarm Jupiter\u201d gas giant with about half the mass of Jupiter on a 53\u2011day orbit.
\nTOI\u2011201 c: a massive companion with about 16 times the mass of Jupiter \u2014 technically a brown dwarf \u2014 on a ~7.9\u2011year orbit.<\/p>\n
What makes TOI\u2011201 extraordinary is how the outer body\u2019s highly elongated and tilted orbit strongly influences the inner planets. Its gravitational pull causes measurable changes in the timing of planetary transits and in the shapes of the orbits \u2014 alterations astronomers can observe over decades rather than millions of years, as is typical in most systems.<\/p>\n
In the study, published in the journal Science, researchers noted that the changing dynamics mean that the planets\u2019 transits may no longer align as seen from Earth in about 200 years. This makes TOI\u2011201 one of the few known systems where orbital evolution is observable on human timescales, offering a unique laboratory for studying how planetary systems form and change.<\/p>\n","protected":false},"excerpt":{"rendered":"
Astronomers Spot Rare Exoplanet System with Rapidly Changing Orbits ————————————– Astronomers have discovered a highly unusual planetary system around the star TOI\u2011201, located about 370 light\u2011years from Earth, where the orbits of its planets are evolving swiftly \u2014 a phenomenon rarely seen in real time. The finding was made using data from NASA\u2019s Transiting Exoplanet …<\/p>\n","protected":false},"author":1,"featured_media":141955,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":{"facebook_108372464460192_245495985553329":""},"rop_publish_now_history":[],"rop_publish_now_status":"pending","footnotes":""},"categories":[21],"tags":[],"class_list":["post-141956","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science"],"yoast_head":"\n