About the Image
- ESA, NASA/ JPL-Caltech/G. Tinett (Instiute d'Astrophysique de Paris, University College London)
About the Object
- HD 189733b
- Planet > Special Cases > Transiting
- Planet > Special Cases > Hot Jupiter
- 63 Light Years
|Infrared||3.6 µm||Spitzer IRAC|
|5.8 µm||Spitzer IRAC|
|8.0 µm||Spitzer IRAC|
- Plot of absorption measured in three IRAC bands
Exoplanet Forecast: Hot and Wet
This plot of data from NASA's Spitzer Space Telescope tells astronomers that a toasty gas exoplanet, or a planet beyond our solar system, contains water vapor.
Spitzer observed the planet, called HD 189733b, cross in front of its star at three different infrared wavelengths: 3.6 microns, 5.8 microns, and 8 microns (see lime-colored dots). For each wavelength, the planet's atmosphere absorbed different amounts of the starlight that passed through it. The pattern by which this absorption varies with wavelength matches known signatures of water, as shown by the theoretical model in blue.
News Release NASA's Spitzer Finds Water Vapor on Hot, Alien Planet ssc2007-12
Image Exoplanet Forecast: Hot and Wet ssc2007-12a
Image Steaming Hot Planet ssc2007-12b
Image Steaming Hot Planet in Infrared ssc2007-12c
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