1,192±9 K (919 °C; 1,686 °F)[5] 1,490±68 K (1,220 °C; 2,220 °F)[6]
HD 189733 b is an exoplanet in the constellation of Vulpecula approximately 64.5 light-years (19.8 parsecs) away[7] from the Solar System. Astronomers in France discovered the planet orbiting the star HD 189733 on October 5, 2005, by observing its transit across the star's face.[1] With a mass 11.2% higher than that of Jupiter and a radius 11.4% greater, HD 189733 b orbits its host star once every 2.2 days at an orbital speed of 152.0 kilometers per second (152,000 meters per second; 340,000 miles per hour), making it a hot Jupiter with poor prospects for extraterrestrial life.[2]
The closest transiting hot Jupiter to Earth, HD 189733 b has been the subject of close atmospheric observation. Scientists have studied it with high- and low-resolution instruments, both from the ground and from space.[8] Researchers have found that the planet's weather includes raining molten glass. HD 189733 b was also the first exoplanet to have its thermal map constructed,[9][10] possibly to be detected through polarimetry,[11] its overall color determined (deep blue),[11][3] its transit viewed in the X-ray spectrum, and to have carbon dioxide confirmed as being present in its atmosphere.
In July 2014, NASA announced the discovery of very dry atmospheres on three exoplanets that orbited Sun-like stars: HD 189733 b, HD 209458 b, and WASP-12b.[12]
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HD189733b is an exoplanet in the constellation of Vulpecula approximately 64.5 light-years (19.8 parsecs) away from the Solar System. Astronomers in...
HD189733, also catalogued as V452 Vulpeculae, is a binary star system 64.5 light-years (19.8 parsecs) away in the constellation of Vulpecula (the Fox)...
very dry atmospheres on HD 209458 b and two other exoplanets (HD189733b and WASP-12b) orbiting Sun-like stars. HD 209458 b has been nicknamed "Osiris"...
NGC 5195 forming a present connected galaxy system. HD189733b forms around parent star HD189733: the first planet to reveal the climate, organic constituencies...
(992 °C; 1,817 °F). This is between the predicted temperatures of HD189733b and HD 209458 b (1,180 K (910 °C; 1,660 °F)–1,392 K (1,119 °C; 2,046 °F)), before...
degrees in the sky away from PSR B1919+21. Vulpecula is also home to HD189733b, one of the closest extrasolar planets studied by the now-retired Spitzer...
layers Extrasolar planet atmospheres: including those of HD189733b and HD 209458 b, Tau Boötis b, HAT-P-11b, XO-1b, WASP-12b, WASP-17b, and WASP-19b. Stellar...
holes in the atmosphere (on Neptune). At least one extrasolar planet, HD189733b, has been claimed to possess such a weather system, similar to the Great...
strongest planetary winds discovered so far are on the extrasolar planet HD189733b, which is thought to have easterly winds moving at more than 9,600 kilometres...
Examples of exoplanets with an evaporating atmosphere are HD 209458 b, HD189733b and Gliese 3470 b. Material from a possible evaporating planet around WD...
May 2015). "Spectrally resolved detection of sodium in the atmosphere of HD 189733b with the HARPS spectrograph". Astronomy & Astrophysics. 577: A62....
434..740D. doi:10.1038/nature03507. ISSN 0028-0836. The polarization of HD189733' Exoplanet 'circles normal star', BBC News Online, September 15, 2008...
successfully partially retrieved for several cases, including HD189733b and HD 209458 b. The quality of the retrieved spectra is significantly more affected...
hydrogen escape speeds from the atmosphere of HD189733b using the Hubble Space Telescope. Additionally, HD189733b and Tau Boötis Ab have their hottest surface...
be in the habitable zone, shepherding a thick asteroid belt. HD 209458 b and HD189733b: These became the first extrasolar planets to have their atmospheric...
oxygen, HD 209458 b is thought to have water vapor in its atmosphere. Sodium and water vapour has also been observed in the atmosphere of HD189733b, another...
detection of an extrasolar planet using this method came in 2008, when HD189733b, a planet discovered three years earlier, was detected using polarimetry...
combining technology. On January 15, 2007, the diameter of an exoplanet, HD189733b, was measured directly, using CHARA. This was achieved by using the observed...
about 1300 K. This is close to 51 Pegasi b; between the predicted temperatures of HD189733b and HD 209458 b (1180-1392K), before they were measured....
them. These effects are called "star–planet interactions" or SPIs. The HD189733 system is the best-studied exoplanet system where this effect was thought...
2007, astronomers successfully mapped the atmospheric temperature of HD189733b, thus obtaining the first map of some kind of an extrasolar planet. Starting...
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