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Projděte si nejnovější vědecké studie o hvězdách a exoplanetách v naší galaxii. Objevte nejnovější výzkumy astrofyziky a hvězdné astronomie.
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Hvězdy podobné Slunci zprávy
Atmospheric differences between morning and evening sides of planet WASP-39 b revealed
12. 10. 2026
Hvězdy | Exoplanety | Hvězdy podobné Slunci | Horký Jupiter | Atmosféry planeThe hot Jupiter exoplanet WASP-39 b exhibits significant differences between the two sides of its atmosphere that transition from day to night. Observations show that the evening side has a larger transit radius and a stronger signature of carbon dioxide compared to the morning side. This phenomenon highlights how the atmosphere of a gas giant planet is not uniform, as shifting winds and chemical changes create unique conditions at the boundaries between day and night.
To understand these fin...
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9. 10. 2026Hvězdy | Exoplanety | Hvězdy podobné Slunci | Atmosféry planeNew observations of the ultrahot Neptune LTT 9779 b reveal the presence of water vapor on its dayside. The planet shows no signs of thermal inversion or significant atmospheric escape, supporting the theory that it is a tidally locked world....
Read article 7. 10. 2026Hvězdy | Exoplanety | Hvězdy podobné SlunciNew statistical analysis refines planetary data. By checking the influence of individual measurements, researchers revised the mass of HD 119130 b, clarified the orbit of Gliese 4276, and confirmed the three-planet system orbiting Gliese 357....
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Frequently Asked Questions about nearby stars
What is the nearest star?
Nearest star is Proxima Centauri, located approximately 4.24 light-years (1.30 parsecs) from the Sun. It is part of the Alpha Centauri star system, which also includes Alpha Centauri A and Alpha Centauri B.
What are the nearest stars to Earth?
Nearest stars to Earth include the Alpha Centauri system (Alpha Centauri A, Alpha Centauri B, and Proxima Centauri), Barnard's Star, and Wolf 359. There are also brown dwarfs Luhman 16 and WISE 0855−0714.
What is the solar neighborhood?
Solar neighborhood (also Local Interstellar Cloud) is the region of interstellar space that surrounds the Sun with diameter about 15 light years. Stellar Catalog database includes all stars contained within this region.
How do astronomers measure distances to stars?
Astronomers use methods like parallax, standard candles, and redshift to measure distances to stars. Parallax is especially useful for nearby stars in our solar neighborhood, while other techniques help map the universe beyond.
Are there any exoplanets orbiting the nearest stars?
Yes, several exoplanets have been discovered orbiting the nearest stars. For example, Proxima Centauri has an exoplanet called Proxima Centauri b, which is located in the star's habitable zone and is the closest known exoplanet to Earth.
Why are the nearest stars important for astronomy and physics?
The nearest stars provide valuable laboratories for studying stellar evolution, space environments, and the fundamental physics of stars. Observing these stars helps astronomers understand the structure of our galaxy and the broader universe.
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StellarGuide: Hvězdy
Hvězdy
Hvězdy jsou obrovské koule horkého plynu, které září díky energii vznikající jadernou fúzí v jejich jádru. Většina hvězd se skládá převážně z vodíku a helia. V centru hvězdy dochází díky vysokému tlaku a teplotě k přeměně vodíku na helium, přičemž se uvolňuje obrovské množství energie ve formě světla a tepla.More about Hvězdy