Astronomers confirm planet-star chemical link 320 light-years away

Astronomers have found that the scorching planet WASP-189b, located 320 light-years away, has a magnesium-to-silicon ratio matching its host star, providing the first direct evidence supporting a long-held assumption about planet formation. This finding could help predict the composition of distant rocky planets. The international team, led by Jorge Antonio Sanchez of Arizona State University, used the IGRINS spectrograph on the Gemini South telescope in Chile to measure these elements in the ultra-hot Jupiter's atmosphere for the first time. The result validates the theory that stars and their planets share similar proportions of rock-forming elements. This chemical link is significant for astrobiology, as stellar chemistry may indicate which planets have conditions suitable for life. The team notes that such high-resolution measurements are currently only possible with ground-based telescopes, opening a new avenue for studying exoplanet atmospheres and habitability.