Water in the transmission spectrum of HD 189733b HD 189733b este o exoplanetă aflată la aproximativ 63 de ani-lumină distanță față de sistemul solar în constelația Vulpea.Planeta a fost descoperită în orbitând steaua HD 189733 pe 5 octombrie 2005, când astronomii din Franța au observat că această planetă tranzitează în jurul stelei.

Light from the planet HD 189733b was captured by the Hubble Space Telescope and analyzed. If seen directly the exoplanet would appear as a ‘deep blue dot’ — looking a lot … In fact, it is actually a gas giant (like Jupiter or Saturn or … But any space traveler confusing it with the friendly skies of Earth would be badly mistaken. HD 189733 b, katalogizovaná také jako V452 Vulpeculae b, je exoplaneta hvězdy HD 189733.Je vzdálena asi 63 světelných let od Slunce, nachází se v souhvězdí Lištičky.Objevena byla 5. října 2005.Jde o první exoplanetu, na níž byl zjištěn methan.Je také první planetou, u které byla určena barva. Its mass is 1.13 Jupiters, it takes 2.2 days to complete one orbit of its star, and is 0.0313 AU from its star. The star has a mass of 81 percent that of the Sun, a radius 76 percent, and a luminosity of 33 percent. The nightmare world of HD 189733 b is the killer you never see coming.

Mặc dù HD 189733b với nhiệt độ khí quyển tăng lên trên 1.000 °C (1.830 °F) không thể ở được, phát hiện này làm tăng khả năng nước, một thành phần thiết yếu của sự sống, sẽ được tìm thấy trên một hành tinh giống Trái đất hơn trong tương lai. HD 189733b is a gas-giant slightly larger than Jupiter located 370 trillion miles (600 trillion km) from Earth - or 63 light-years. Simulating the cloudy atmospheres of HD 209458 b and HD 189733 b with the 3D Met Office Unified Model 2018 LINES S., MAYNE N., BOUTLE I., MANNERS J., LEE G. et al. HD 189733b — an exoplanet located about 63 light-years away — has now had its actual visible-light color deduced, thanks to new research done with NASA’s Hubble Space Telescope.

& Astrophys., 615, A97 arxiv paper Exoplanet atmospheres with GIANO. 1. GMRT search for 150 MHz radio emission from the transiting extrasolar planets HD 189733 b and HD 209458 b 2011 LECAVELIER des ETANGS A., SIROTHIA S., GOPAL-KRISHNA & ZARKA Ph. Astron. Astronomers say that the giant planet has a deep-blue atmosphere, but conditions are in … To the human eye, this far-off planet looks bright blue. HD 189733b is the first exoplanet caught passing in front of its parent star in X-rays.

HD 189733 b is a gas giant exoplanet that orbits a G-type star. Ta je azurově modrá.

Just because HD189733b is blue, it doesn’t mean it has to be habitable.