A massa de HD 189733b é cerca de 15% maior que a de Júpiter.Em 2013 o telescópio espacial Hubble revelou que o exoplaneta HD 189733 B é azul, porém acredita-se que o azul dele não vem da reflexão de um oceano, mas deve-se a uma atmosfera gasosa e turbulenta, composta principalmente por hidrogênio e carregada por partículas de silicato, transmitindo assim luz azul. Sa découverte a été annoncée en 2005 [6]. HD 189733 Ab (nom souvent simplifié en HD 189733 b, avec un « b » minuscule) a été détectée grâce à ÉLODIE, un spectrographe installé au foyer du télescope de type Cassegrain de 1,93 mètre de diamètre de l'Observatoire de Haute-Provence. The class K1.5 dwarf star HD 189733, found in the constellation Vulpecula, lies at the center of the circle just a bit southeast of 14 Vul.

But while the distant world is approximately the size of Jupiter, its close-in orbit makes it much hotter than our solar system's ruling gas giant. These have been interpreted in terms of a bow shock or an accretion stream that transits the host star before the planet. The planet was discovered orbiting the star HD 189733 A on October 5, 2005, when astronomers in France observed the planet transiting across the face of the star.

'The nightmare world of HD 189733 b is the killer you never see coming,' said Nasa. HD 189733b is a gas giant slightly larger than Jupiter, in it, it rains glass at a speed of 8,700 Km per hour, and a relative temperature of 700 degrees, it is considered a bunch of hells, and no one can touch it without having parts destroyed or completely cut off by her atmosphere and heat, which makes her a mortal enemy to many, but her reign is ending, she is slowly evaporating. HD 189733 b is an extrasolar planet approximately 63 light-years away from the Solar System in the constellation of Vulpecula, the Fox.

Sciences. La planète HD 189733 b a été découverte en 2005. The host star HD 189733 has apparent magnitude of 7.7, with absolute magnitude of 6.2. Scroll down for video Observations have provided evidence for in-transit hydrogen Hα absorption as well as variable pre-transit absorption signals. Il …

HD 189733b: Hot Jupiter Credit: Heather Knutson (Harvard-Smithsonian CfA) et al., NASA / JPL-Caltech.

Its discovery was publicly announced on 2005. Pourquoi certains jours fériés changent-ils de date chaque année ?

The planet is classified as a hot Jupiter class Jovian planet, with a close orbit to its parent star. HD 189733 b is an extrasolar planet approximately 63 light-years away in the constellation of Vulpecula (the Fox).The planet was discovered orbiting the star HD 189733 on October 5, 2005, when astronomers in France observed the planet transiting across the face of the star.

Hot Jupiters are surrounded by extended atmospheres of neutral hydrogen. HD 189733 b; HD 189733 b is an exoplanet orbiting the star HD 189733, located about 64.5 light-years (19.8 pc) away from Solar System. A HD 189733 b forró jupiter típusú exobolygó, a HD 189733 kettőscsillag körül kering. In 2006, astronomers discovered a very dim ("mid-range"), red dwarf companion to HD 189733 A of spectral and luminosity type M V. Observed at a separation of 216 AUs from Star A, the companion star has a clockwise orbit that is nearly perpendicular to the orbital plane of transiting planet b around Star A (HD 189733 b or Ab). Très proche de son étoile, elle accomplit une révolution en 48 heures. It is 0.8 times more massive and 0.8 times bigger compared with our Sun. Planet of HD 189733, see details about HD 189733b in the Extrasolar Planets Encyclopaedia. Context. L'astre en question, dénommé HD 189733b, a été découvert en 2005 par le Français Francois Bouchy. Explanation: HD 189733b is a Jupiter-sized planet known to orbit a star some 63 light-years away. This illustration shows HD 189733b, a huge gas giant that orbits very close to its host star HD 189733.

Franc CFA : pourquoi des pays d’Afrique de l’Ouest n’en voulaient plus.

Plan B; 06:53 .

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