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Over the preceding decades, the exploration of the cosmos has yielded the identification of over 5000 exoplanets, each orbiting stars exhibiting both similarities and disparities with our sun. These celestial entities manifest a spectrum of characteristics, including variations in interior composition, size, mass, and atmospheric constitution relative to the planets within our solar system. This colloquium undertakes a comprehensive examination of the evolutionary trajectories of exoplanets, elucidating diverse formation and developmental mechanisms pivotal to the contemporary distribution of observed planets. A focused inquiry into the dynamics of primordial atmospheres in exoplanets, with particular emphasis on the nuanced evolution of small planetary atmospheres, constitutes the core of the discussion. Transit observational outcomes derived from the InfraRed Doppler spectrograph installed on the 8.2-meter Subaru telescope at the National Astronomical Observatory of Japan (NAOJ) atop Mauna Kea, alongside observations from the recently commissioned NIRPS spectrograph on the European Southern Observatory's (ESO) 3.6-meter telescope, will be presented. These findings contribute to the advancement of our understanding of the broader exoplanetary landscape, providing valuable insights into the intricate processes shaping planetary evolution within the universe.
Colloquium Committee