Stellar, planetary, and galactic studies

Stellar, planetary, and galactic astrophysics traces how matter organizes itself across cosmic scales, from the nuclear furnaces inside individual stars to the formation of planetary systems to the large-scale structure and history of entire galaxies like the Milky Way. Missions such as Gaia and Kepler have transformed the discipline by delivering precise measurements of stellar positions, motions, and brightnesses for hundreds of millions of objects, enabling researchers to reconstruct how our galaxy assembled over billions of years and to catalog thousands of planets orbiting distant suns. Among the most active open questions are how massive stars shape their surrounding environments before dying as supernovae, what determines whether a planetary system becomes hospitable to complex chemistry, and how the chemical enrichment of galaxies through successive generations of stars connects local stellar populations to the universe's broader evolutionary history.

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283,076

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4,025,164

Keywords

Stellar AstrophysicsExoplanetsGalactic EvolutionStellar EvolutionMilky WayGaia Mission