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Latest astronomy zprávy
Zůstaňte v obraze s nejnovějšími astronomickými zprávami, objevy o hvězdách a exoplanetách a aktuálním výzkumu. Prozkoumejte čerstvé články ze světa astronomie.
14. 4. 2026
Hvězdy | ExoplanetyGJ 436 b is a hot Neptune with a polar and eccentric orbit, making it a rare example among planets in the so-called sub-Jovian desert. Scientists analyzed 20 years of radial velocity and astrometric data to search for a distant, unseen companion that could explain the planet's unusual orbit. Their results set strong limits on the possible mass and distance of such a companion, ruling out massive objects close to the star but allowing for a sub-Jovian mass perturber farther out.
Dynamical simu...
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14. 4. 2026HvězdyWD J000801.25-350450 is a white dwarf star with two widely separated, co-moving companions. New spectroscopic observations confirm that the white dwarf is hydrogen-rich, with a temperature of about 6200 Kelvin and a mass similar to the average white dwarf. The inner companion is an M8-type red dwarf, while the outer companion appears to be a binary system made up of M6 and M9-type stars.
This configuration suggests that the system may actually...
Read article 14. 4. 2026Hvězdy | ExoplanetyGliese 486 b is a planet orbiting close to a red dwarf star, where intense radiation likely caused much of its original atmosphere to escape. Scientists used computer models to study how the planet's current water content could be explained by different combinations of an early hydrogen-rich atmosphere and water inventory. They found that even a small amount of hydrogen in the early atmosphere could have protected water from escaping, reducing th...
Read article 14. 4. 2026HvězdyHD 163296 is a young star surrounded by a disk of gas and dust where planets are forming. Using the ALMA telescope, scientists detected compact emission of hydrogen sulfide (H2S) and sulfur oxides in the innermost part of the disk. The emission comes from a region just 3–5 astronomical units from the star, where temperatures are high enough for sulfur-bearing ices to turn into gas.
The observations show that H2S is a major sulfur-containing mo...
Read article 14. 4. 2026Hvězdy | Exoplanety | Hvězdy podobné SlunciHD 161098 is a Sun-like star located about 30 parsecs away. Using advanced instruments and long-term radial velocity monitoring, scientists have detected two signals that may indicate the presence of planets. The first candidate, HD 161098 b, has a minimum mass of about 3.6 times that of Earth and orbits the star every 72.6 days. The second, HD 161098 c, is more massive, with a minimum mass of about 7.8 Earth masses and an orbital period of 682.5...
Read article 14. 4. 2026Hvězdy | Exoplanety | Atmosféry planeHD 25295 b, also known as TOI-4602 b, is a sub-Neptune planet orbiting a bright and quiet star. Precise measurements of its mass and radius show that it is about 2.5 times the size of Earth and 5.5 times as massive. This places it just above the so-called radius valley, a region where few planets are found, and suggests that it is in transition between a sub-Neptune and a super-Earth.
The planet's bulk density indicates that it still has a thi...
Read article 12. 4. 2026Hvězdy | Exoplanety | TESSTOI-1710 A b is a warm Neptune-sized planet that orbits its star in the opposite direction to the star's rotation, a configuration known as anti-alignment. This rare arrangement was discovered using the Rossiter-McLaughlin effect, which measures how the planet's transit affects the star's light. The planet's orbit is almost exactly opposite to the star's spin, with a true obliquity of about 158 degrees.
The host star has a distant M-dwarf comp...
Read article 12. 4. 2026Hvězdy | ExoplanetyWASP-96b is a hot Saturn-like planet whose atmosphere has been studied using both the James Webb Space Telescope and ground-based telescopes. The combined data show clear signs of water vapor, carbon dioxide, and sodium in the planet's atmosphere. While carbon monoxide could not be confirmed, the results suggest that the atmosphere contains two to six times more heavy elements than its star, a property known as super-solar metallicity.
The pla...
Read article 12. 4. 2026Hvězdy | ExoplanetyScientists used the James Webb Space Telescope to search for exomoons, similar to Earth's Moon, around the rocky planets TOI 700 d and e, which orbit in the habitable zone of a red dwarf star. While no exomoons were detected, the study improved the precision of the planets' orbits and sizes, making future searches more effective.
The team found a noise signal in the data, likely caused by the star's surface activity, which made it harder to de...
Read article 12. 4. 2026Hvězdy | ExoplanetyWASP-11 b, also known as HAT-P-10 b, is a hot Jupiter with a low density, making it a good candidate for studying its atmosphere. Researchers collected 31 new transit observations and combined them with previous ground-based and space-based data to refine the planet's properties and analyze its orbit over 16 years.
The updated analysis shows that WASP-11 b's orbit is stable, with no signs of orbital decay or additional planets affecting its mo...
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Nově objevené exoplanety
| EK Chamaeleontis b | 10 / 2026 | 2702.2 M⊕ | 321.3 ly | |
| HD 715 b | 10 / 2026 | 201.9 M⊕ | 542.8 ly | |
| DENIS J1253-5709 b | 10 / 2026 | 244.8 M⊕ | 54.4 ly | |
| TOI-6417 b | 09 / 2026 | 349.7 M⊕ | 1903.9 ly | |
| TOI-6443 b | 09 / 2026 | 1605.4 M⊕ | 2051.6 ly | |
| TOI-7219 b | 09 / 2026 | 661 M⊕ | 1074.2 ly | |
| TOI-4079 B b | 09 / 2026 | 1646.8 M⊕ | 1185.6 ly | |
| HD 45652 b | 09 / 2026 | 1557.7 M⊕ | 113.9 ly | |
| LSPM J0804+1116 b | 09 / 2026 | 6.4 M⊕ | 82.6 ly | |
| HR 8799 f | 09 / 2026 | 524.5 M⊕ | 133.3 ly | |
| 61 Cygni A b | 09 / 2026 | 2543.3 M⊕ | 11.4 ly | |
| TOI-5646 b | 08 / 2026 | 45.9 M⊕ | 1352.3 ly | |
| TOI-4468 c | 08 / 2026 | 11.1 M⊕ | 1233.1 ly | |
| TOI-4468 b | 08 / 2026 | 170.1 M⊕ | 1233.1 ly | |
| TOI-4468 d | 08 / 2026 | 311 M⊕ | 1233.1 ly |
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