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Horký Jupiter
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Horký Jupiter

Horký Jupiter je obří plynná planeta podobná našemu Jupiteru, ale s jedním zásadním rozdílem: obíhá extrémně blízko své hvězdy. Zatímco náš Jupiter potřebuje k oběhu Slunce 12 let, tito exoti dokončí svůj „rok“ za pár dní. Kvůli žáru hvězdy se jejich atmosféra nafukuje jako horkovzdušný balon, což z nich činí řídké a „nadýchané“ světy. V naší sluneční soustavě nic podobného nenajdeme; u nás jsou v blízkosti Slunce jen malé kamenné planety.
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Latest news from Horký Jupiter

WASP-33 b and other hot Jupiters identified as prime targets for structural studies
iconToday
iconHvězdy | Exoplanety | Horký Jupiter | Vesmírný dalekohled Jamese Webba | ARIEL
Image: WASP-33 b and other hot Jupiters identified as prime targets for structural studies
The physical shape of a giant planet orbiting close to its star offers a unique window into its internal composition. Intense gravitational pull from the host star stretches these planets, causing measurable deformations. These distortions are calculated using a value called the fluid Love number, which describes how a planet responds to external gravitational stress. By measuring this number, researchers can better understand how matter is distributed deep within a planet and test different mod...
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Thick-disk stars identified as hosts to ancient hot jupiter planets
iconToday
iconHvězdy | Exoplanety | Hvězdy podobné Slunci | Horký Jupiter | Vznik plane
Image: Thick-disk stars identified as hosts to ancient hot jupiter planets
New analysis of 268 stars identifies several hot Jupiters orbiting ancient stars in the Milky Way's thick disk. These systems, over 8 billion years old, show distinct differences in mass and orbital periods compared to younger thin-disk populations....
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Atmospheric composition of hot Jupiter KELT-2A b reveals chemical history
iconYesterday
iconHvězdy | Exoplanety | Horký Jupiter | Atmosféry plane
Image: Atmospheric composition of hot Jupiter KELT-2A b reveals chemical history
New observations of hot Jupiter KELT-2A b confirm water vapor in its atmosphere. The planet shows a carbon-to-oxygen ratio similar to its host star but with overall lower metallicity, suggesting a complex migration history from far out in its star system....
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Periodic transit timing variations measured for Neptune-like planet HAT-P-18 b
iconYesterday
iconHvězdy | Exoplanety | Superzemě | Horký Jupiter | Vesmírný dalekohled Jamese Webb
Image: Periodic transit timing variations measured for Neptune-like planet HAT-P-18 b
New observations from the James Webb Space Telescope show periodic transit timing variations in the Neptune-like planet HAT-P-18 b. The data indicates an orbital timing shift of 92.9 seconds, providing fresh insights into the dynamics of this distant system....
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Escaping atmosphere of the ultrahot Jupiter KELT-18 b reveals metastable helium
icon14. 10. 2026
iconHvězdy | Exoplanety | Horký Jupiter | Atmosféry plane
Image: Escaping atmosphere of the ultrahot Jupiter KELT-18 b reveals metastable helium
Researchers have detected metastable helium escaping from the ultrahot Jupiter KELT-18 b. This confirms the massive gas giant is undergoing active atmospheric photoevaporation. KELT-18 b is now the most massive planet found with this specific helium signature....
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