Space – NASA’s TESS Tunes into an All-sky ‘Symphony’ of Red Giant Stars (NASA)

NASA writes: Using observations from NASA’s Transiting Exoplanet Survey Satellite (TESS), astronomers have identified an unprecedented collection of pulsating red giant stars all across the sky. These stars, whose rhythms arise from internal sound waves, provide the opening chords of a symphonic exploration of our galactic neighborhood. TESS primarily hunts for worlds beyond our solar system, also known as exoplanets. But its sensitive measurements of stellar brightness make TESS ideal for studying stellar oscillations, an area of research called asteroseismology. “Our initial result, using stellar measurements across TESS’s first two years, shows that we can determine the masses and sizes of these oscillating giants with precision that will only improve as TESS goes on,” said Marc Hon, a NASA Hubble Fellow at the University of Hawaii in Honolulu. “What’s really unparalleled here is that TESS’s broad coverage allows us to make these measurements uniformly across almost the entire sky.”

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