TIC 470710327, a massive, compact hierarchical triple-star system recently identified by NASA’s Transiting Exoplanet Survey Satellite (TESS), was originally a 2+2 quadruple-star system, according to new research led by Niels Bohr Institute astronomers. An artist’s impression of the HR 6819 triple system. Image credit: L. Calçada / ESO. TIC 470710327 was identified earlier this year in TESS data and followed up with the HERMES spectrograph on...