Photo of the Day: Sunset on the exoplanet HD209458b




Photo of the Day: Sunset on the exoplanet HD209458b

The photo above captures the sunset on extrasolar planets HD209458b, located at a distance of 150 light-years from our Sun. Extraordinarily beautiful phenomenon recreated Frederic Pont of the University of Exeter. The researchers used data from the camera installed on the orbiting astronomical observatory “Hubble.”

In writing the cosmic picture Pontus useful knowledge about the interaction of light with chemicals and skills in computer simulation. This means that you can watch the evening dawn on the planet outside the solar system.

Extrasolar planet in question, also known as Osiris (Osiris). Because of the extreme proximity to its star (Earth is much farther from the Sun), the surface of Osiris is heated to extremely high temperatures.

In moments of passage of the planet across the disk of light from its star passes through the atmosphere and reaches us. This allowed Pont to determine the chemical composition of the atmosphere of Osiris and set the color, visible to the naked human eye.

Osiris star emits white light similar to sunlight. However, during the passage through the atmosphere of Osiris contained therein sodium absorbs the red, causing the star to shine in blue.

When entering the star its light is scattered, and blue color change to green. The process resembles the sunset on Earth. And finally, because of the change of direction of light propagation bottom of the picture looks slightly flattened.

Earlier ALMA telescope in Chile took a picture of the planet, which arose out of stardust .
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