HD 189733b
| HD 189733b | |
 (c) ESA/Hubble, CC BY 4.0 Konstnärens föreställning av HD 189733b. | |
| Upptäckt | |
|---|---|
| Upptäcktsdatum | 5 oktober 2005 |
| Moderstjärna | |
| Moderstjärna | HD 189733[1] |
| Stjärnbild | Räven[2] |
| Hitta fler artiklar om astronomi med | |
HD 189733b är en exoplanet 63 ljusår från jorden[3] som kretsar runt stjärnan HD 189733, en K-stjärna av magnitud 7,75.[1] Den är lite större än Jupiter.[4] HD 189733b kretsar väldigt nära sin moderstjärna, och har en yttemperatur på 1800 °C.[4] Den gör ett varv runt sin stjärna på 2,2 dygn.[3] Vindar i 7200 km/h har observerats på HD 189733b.[4]
Referenser
- ^ [a b] Remco J. de Kok, Matteo Brogi, Ignas A.G. Snellen, Jayne Birkby, Simon Albrecht, Ernst J. W. de Mooij, Detection of carbon monoxide in the high-resolution day-side spectrum of the exoplanet HD 189733b, Astronomy and Astrophysics, läst på arXiv
- ^ How to Map a Very Faraway Planet
- ^ [a b] Strange Blue World: Alien Planet's True Color Revealed, a First, space.com, 11 juli 2013
- ^ [a b c] Kaukaisella planeetalla puhaltavat huippunopeat tuulet, Ursa, 13 november 2015
Media som används på denna webbplats
Artist’s impression of the deep blue planet HD 189733b.jpg
(c) ESA/Hubble, CC BY 4.0
This illustration shows HD 189733b, a huge gas giant that orbits very close to its host star HD 189733. The planet's atmosphere is scorching with a temperature of over 1000 degrees Celsius, and it rains glass, sideways, in howling 7000 kilometre-per-hour winds. At a distance of 63 light-years from us, this turbulent alien world is one of the nearest exoplanets to Earth that can be seen crossing the face of its star. By observing this planet before, during, and after it disappeared behind its host star during orbit, astronomers were able to deduce that HD 189733b is a deep, azure blue — reminiscent of Earth's colour as seen from space.
(c) ESA/Hubble, CC BY 4.0
This illustration shows HD 189733b, a huge gas giant that orbits very close to its host star HD 189733. The planet's atmosphere is scorching with a temperature of over 1000 degrees Celsius, and it rains glass, sideways, in howling 7000 kilometre-per-hour winds. At a distance of 63 light-years from us, this turbulent alien world is one of the nearest exoplanets to Earth that can be seen crossing the face of its star. By observing this planet before, during, and after it disappeared behind its host star during orbit, astronomers were able to deduce that HD 189733b is a deep, azure blue — reminiscent of Earth's colour as seen from space.