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Mauna kea keck observatory11/30/2023 It turns out to be approximately 1.5 times heavier than the Sun and must have reached the red giant stage. Baekdu is one of the fainter objects in the constellation of Ursa Minor and, unlike its "neighbor" Polaris, cannot be seen with the naked eye. An unusual pairĪnalyses of these data prove Baekdu and Halla to be something of an oddity. Keck Observatory and the Canada-France-Hawaii Telescope on the Hawaiian volcano Mauna Kea also inspected Baekdu and Halla closely. With the help of methods of asteroseismology, scientists can then infer the stars’ age, mass and evolutionary state. Tess routinely records observational data such as characteristic brightness variations caused by stellar oscillations from thousands of stars. It wasn't until Nasa's space telescope Tess (Transiting Survey Satellite) took a closer look between 20 that it became possible to determine other properties of the star and its companion. Without knowing of the host star’s red-giant stage Halla's close orbit did not surprise. Also, the measurements at the Bohyunsan Optical Astronomy Observatory at that time could not firmly identify the evolutionary state of the star. Upon its discovery eight years ago by a South Korean research team, exoplanet Halla was by no means deemed remarkable. As a result, Halla may never have been in any danger. Most likely, Baekdu was born as part of a binary system and therefore never expanded to a size that would be expected for a single star reaching the same evolutionary stage. A researcher from the Max Planck Institute for Solar System Research in Göttingen contributed to computer simulations that led to this explanation. An international team of 42 researchers led by the University of Hawaii examined the unusual pair and presents an explanation for its existence in the journal Nature. No other planets orbiting similarly close to a red giant star are known. When Baekdu inflated in its previous expansion phase, it should have "swallowed" such a close companion. At far too close a distance, Halla orbits the red giant star Baekdu. The constellation Ursa Minor is home to a planet that cannot exist.
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