Astronomers have discovered a number of exoplanet HD 209458b, snowfall on the planet is black.
Exoplanet HD 209458b have been falling on the black snow (Art Figure) oxide component
According to foreign media reports, a number of astronomers discovered exoplanet HD 209458b, snowfall on the planet is black. Astronomical classification, exoplanet HD 209458b is part of a “hot Jupiter” family, “hot Jupiter” is the distance from the central star closer to a class of giant gaseous planets. Our solar system in two giant gas planets – Jupiter and Saturn due to relatively distant from the sun, so in a cold state. HD 209458b planet’s rotation is tidally locked (tidally locked), one side always faces the star, which means that it is always the day side and the other side is always in darkness. Stars in the daytime side up over 2000 degrees Celsius temperature, while in the night side of the relatively low temperature, about 500 degrees Celsius.
Therefore, in such an extreme planet, snow can not be made of water condensation forming! There is a huge difference in temperature due to the two hemispheres, resulting in atmospheric flow between the two hemispheres continuous exchange of matter and energy. This means that, in the day side in the gaseous substances into the side is cooled to a solid, and resembles the “snow” in the form of night have whereabouts. Dioxide is one of a class of substances.
Although titanium is only hot Jupiter’s atmosphere in a team points, but this substance can form snowfall has a unique physical and chemical properties. Hot Jupiter old model shows dioxide condenses into the night sky snow have fallen, and then deposited on the ground forever.
Now, astronomers have created a new 3D computer model to simulate the changes in the physical state of the hot Jupiter. The new model suggests that falling into a solid dioxide gas can be re-entering the atmosphere, a strong updraft can put it back into the upper atmosphere, into the upper atmosphere dioxide can participate in a new round of snow to form a continuous material cycle.