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Hubble Space Telescope determined visible color of the first exoplanet (HD 189733b) - and it is BLUE!

Hubble Space Telescope determined visible color of the first exoplanet (HD 189733b) - and it is BLUE! | shaunowire | Scoop.it
Hubble Space Telescope measures visible light from an exoplanet.

 

A navy-blue world orbiting a faraway star is the first exoplanet to have its color directly measured. Discovered in 2005, HD 189733b is one of the best-studied planets outside the Solar System, orbiting a star about 19 parsecs away in the Vulpecula, or Fox, constellation. Previous efforts to observe the planet focused on the infrared light it emits — invisible to the human eye.

 

Last December, astrophysicist Tom Evans at the University of Oxford, UK, and his colleagues used the Hubble Space Telescope to observe the planet and its host star. Hubble's optical resolution is not high enough to actually 'see' the planet as a dot of light separate from its star, so instead, the telescope receives light from both objects that mix into a single point source. To isolate the light contribution of the planet, Evans and his colleagues waited for the planet to move behind the star during its orbit, so that its light would be blocked, and looked for changes in light color.

 

A spectrograph on board the Hubble monitored light coming from the source, in wavelengths ranging from yellow to ultraviolet. During the eclipse, the amount of observed blue light decreased, whereas other colours remained unaffected. This indicated that the light reflected by the planet's atmosphere, blocked by the star in the eclipse, is blue. The team reports its findings in the 1 August 2013 issue of Astrophysical Journal Letters.

 

"This is the first time this has been done for optical wavelengths," said Alan Boss, an astrophysicist at the Carnegie Institution for Science in Washington DC. "It's a technical tour de force." The amount of visible light bouncing off a planet is typically small compared to light fluctuations in a star, making planets difficult to distinguish. Fortunately, HD 189733b is large relative to other exoplanets — and well illuminated.

 

Although the planet seems to be the shade of a deep ocean, it is unlikely to host liquid water. The exoplanet is a giant ball of gas, similar to Jupiter, and was previously often painted brown and red in artists' impressions.

 

The blue color may come from clouds laden with reflective particles that contain silicon — essentially raindrops of molten glass. Evidence for this idea dates to 2007, when Hubble observed the planet passing in front of its star. Light from the star seemed to be passing through a haze of particles.

 

"Our best theory points to a layer of clouds deep in the planet's atmosphere," says Evans. Clouds at high altitudes would simply reflect every colour back into space, making the planet look white. Light bouncing off clouds lower in the atmosphere might pass through a layer of sodium that would selectively absorb red light but allow blue light to escape.

 

But clouds are not the only possible explanation for the blue hue. Jonathan Fortney, an astrophysicist at the University of California, Santa Cruz says that the planet's colour “seems consistent with the scattering of light by hydrogen molecules in the atmosphere".


Via Dr. Stefan Gruenwald, shaun kerry
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xrachellynn's photo on Instagram (Had fun playing tennis and riding around on this beautiful day today!
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Google's First Tweet from their Official Twitter Account - The Next Web

Google created an official google account on twitter and announced their arrival with a string of 0's and 1's. There are already other Google twitter accou.
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Free Report on How To get Rid of Cellulite

Don't miss this report. You don't need expensive pills or lotions to get rid of your cellulite. You can do it at home if you follow this regime http://www.scribd.com/doc/137517307/5-Steps-to-Kill-Your-Cellulite
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Una cura natural para todos los que sufren de problemas de cistitis y otras enfermedades de la vejiga

Waterfall D-Mannose es un monosacárido (un ázúcar sencillo), relacionado con la glucosamina, que tiene la capacidad de adherirse a bacterias y evita que las bacterias se adhieran a células de su cuerpo. Cuando evita que las bacterias se adhieran, evita los síntomas de la infección de la vejiga, porque cuando las bacterias no se pueden adherir a los riñones, las paredes de la vejiga o al tracto urinario, no pueden causar síntomas de infección de los riñones u otros síntomas. Con la potencia de Waterfall D-Mannose, la gente puede eligir entre su propio tratamiento natural de la cistitis o continuar con la ruta alopática que ya puede haberle fallado. La noticia del producto se ha pasado de una persona a otra y de un terapeuta a otro en todo el mundo. En la actualidad muchos urólogos y médicos recomiendan Waterfall D-Mannose. Muchas clínicas y farmacias la tienen en existencias
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Socata TB-200 Tobago XL - F-GNHG (Associazione Sportiva ...

Socata TB-200 Tobago XL - F-GNHG (Associazione Sportiva ... | shaunowire | Scoop.it
Socata TB-200 Tobago XL - F-GNHG (Associazione Sportiva Tobago) by Enrico Tovoli - Share your aviation pictures and discover Thousands of high resolution photographs, airlines' information, manufacturers, world ...
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Een natuurlijk geneesmiddel tegen blaasontsteking en andere blaasaandoening

Dit is wat een vrouw zij – “Ik ben erg tevreden met Waterfall D-Mannose, het werkt extreem goed. Ik heb de laatste anderhalf jaar last gehad van E. coli, ook al heb ik de vorige blaasontstekingen kunnen controleren door simpelweg veel water te drinken bij het eerste teken van de symptomen. Sinds ik D-Mannose gebruik (regelmatig, met lage dosering en hogere dosering voor en na seks) heb ik geen blaasontstekingen meer gehad !!! Ik zal het zeker in het vervolg blijven gebruiken”.
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Cómo Eliminar la CELULITIS

La celulitis es parte de nuestro cuerpo. Nada de lo que hagas va a detener los factores que ya están en juego y que determinan quién recibe qué grado de celulitis. Lo que sí está bajo tu control es hacer que la celulitis siga siendo apreciable o no. http://cellulite-advice.com/cual-es-el-mejor-tratamiento-para-la-celulitis/ En primer lugar, tienes que asegurarte de que no estás privando a tu cuerpo de la hidratación que necesita. Cuando estás hidratada, eso se refleja en tu piel. Acabas con una piel que parece mucho más suave -- y eso puede hacer que las zonas abultadas tengan un mejor aspecto.
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