Exoplanet systems as a research area investigate the formation, architecture, dynamics, and physical properties of planetary systems orbiting stars other than the Sun, integrating observational, theoretical, and computational approaches. The field encompasses detection techniques (e.g., transits, radial velocities, direct imaging, microlensing), characterization of planetary masses, radii, atmospheres, and orbits, and statistical studies of population demographics as functions of stellar type, metallicity, and environment. It also addresses disk–planet interactions, migration processes, multi-planet dynamics, and stability, with implications for planet formation theories, comparative planetology, and the occurrence and potential habitability of terrestrial and giant planets in diverse stellar contexts.
In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and planetary masses silently orbit their stars—sometimes thousands of astronomical units (AU) away. For years, ...
Astronomy
May 27, 2025
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When astronomers announced last month they might have discovered the most promising hints of alien life yet on a distant planet, the rare good news raised hopes humanity could soon learn we are not alone in the universe.
Astronomy
May 24, 2025
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Co-paired stars, or stars that travel together, can provide insights into processes that other stars can't. Differences in their brightness, orbits, and chemical composition can hint at different features, and scientists ...
Astronomy
May 22, 2025
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A small international team of astronomers has confirmed that a binary star system with an odd signal has a companion—a planet roughly twice the size of Jupiter, which may have emerged from a circumbinary orbit or from a second-generation ...
An international team of astronomers reports the discovery of a new giant exoplanet around an M-dwarf star (GEMS). The newfound GEMS, designated TOI-5573 b, is comparable in size to Saturn and its mass is estimated to be ...
Tracking exoplanets via orbital mechanics isn't easy. Plenty of variables could affect how a planet moves around its star, and determining which ones affect any given exoplanet requires a lot of data and a lot of modeling.
Astronomy
May 20, 2025
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Exoplanets—planets that orbit stars beyond our solar system—have transformed our understanding of the universe. Since the first confirmed discovery in the 1990s, more than 5,000 have been identified, ranging from scorching ...
Planetary Sciences
May 16, 2025
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A team of researchers has recently claimed they have discovered a gas called dimethyl sulfide (DMS) in the atmosphere of K2-18b, a planet orbiting a distant star.
Astrobiology
May 15, 2025
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Is frozen water scattered in systems around other stars? Astronomers have long expected it is, partially based on previous detections of its gaseous form, water vapor, and its presence in our own solar system.
Astronomy
May 14, 2025
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An international planet hunt spearheaded by Monash University researchers has discovered evidence of five new baby planets, so young they are still growing.
Astronomy
May 14, 2025
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