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Naine orange
Les étoiles de type K sont les poids moyens de la galaxie, situées entre les petites naines rouges et les étoiles comme notre Soleil. Elles possèdent entre 60 % et 90 % de la masse solaire et brûlent leur carburant lentement. Si le Soleil était un feu de camp durant 10 milliards d'années, une naine orange serait une bûche couvant jusqu'à 70 milliards d'années. Émettant moins de radiations nocives que les naines rouges et vivant plus longtemps que les soleils jaunes, leurs systèmes planétaires sont des lieux privilégiés pour chercher de la vie extraterrestre.
- Percentage of Naine orange within 98.5 années lumière: 10.82 % (1030 from 9522 stars)
- Average masse of Naine orange: 50-80% solar mass
- Average rayon of Naine orange: 60-90% solar radius
- Average température of Naine orange: 3900-5200 K
Naine orange
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Naine orange
Naine orange
Latest news from Naine orange
Massive brown dwarf HD 203771 b confirmed in eccentric orbit around orange dwarf
14. 10. 2026
Étoiles | Exoplanètes | Naine orange | Naines bruneThe massive brown dwarf known as HD 203771 b has been characterized as orbiting its host orange dwarf star once every 1140 days. Brown dwarfs are often called failed stars because they are more massive than planets but not heavy enough to sustain the nuclear fusion that powers stars. This particular companion follows an eccentric, or elongated, path that is inclined at an angle of approximately 130 degrees relative to its host. The host star itself has a mass estimated at 0.79 times that of the ...
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12. 10. 2026Étoiles | Exoplanètes | Naine orangeNew measurements for the orange dwarf HD 219134 refine its age to 8.92 billion years. Asteroseismic analysis settles past debates on its radius and reveals how the star's radiation history influenced the atmospheres of its companion planets....
9. 10. 2026Étoiles | Exoplanètes | Naine orange | Super-Terre | Atmosphères planétaireNew study characterizes the three-planet system K2-233. The 400 million year old orange dwarf hosts inner iron-rich planets and an outer planet, K2-233 d, that is actively losing its atmosphere. Over time, K2-233 d will likely become a sub-Neptune or super-Earth....
9. 10. 2026Étoiles | Exoplanètes | Naine orange | TESS | CHEOPS | Super-TerreTOI-2211 b is identified as a potential hot water world. Observations of this super-Earth, which orbits its orange dwarf star every 3.09 days, reveal a mass of 2.69 Earth masses and a radius of 1.457 Earth radii. A second planetary candidate was also detected....
6. 10. 2026Étoiles | Exoplanètes | Naine orangeObservations of the disintegrating planet BD+05 4868 b suggest the presence of an escaping rock-vapor outflow. The detected oxygen signatures provide a unique look at how intense radiation strips material from the surfaces of rocky exoplanets....
Research in Naine orange
Parcourez les dernières études scientifiques sur les étoiles et les exoplanètes de notre galaxie. Découvrez les dernières recherches en astrophysique et en astronomie stellaire.
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