Gray clouds over Mars.

<P Align=center> </ P> <P align=left> Technology Channel (tech.) message: "Mars Express" was taken to the gray clouds above Mars, the European Space Agency's "Mars Express" spacecraft recently .found over large areas of Mars, the gray clouds, although from the appearance point of view, they are gray with the clouds in the Earth's atmosphere are very similar, but research shows that the gray clouds on Mars, the airspace in which the higher and the ingredients are completely different. .</ P> <P align=left> scientists said, the gray clouds on Mars, about 80-100 km height from the ground (similar to Earth in cloud height between 50-90 km.) .Prior to that, they never like on other planets discovered cloud height. .</ P> <P align=left> However, the density of Mars is very thin clouds, the experts explained that if people want to see the gray clouds on Mars, then he must wait for the evening sunset - only .At the moment, they will be the phenomenon in the sunlight out of stature. .</ P> <P align=left> However, the Earth's middle atmosphere mainly composed of water ice clouds form, and the gray clouds in the Martian atmosphere is mainly composed of carbon dioxide crystals. .Of course, this situation does not allow the experts by surprise - the temperature of the upper atmosphere of Mars is only minus 193 degrees Celsius. .</ P> <P align=left> observations show that the gray clouds on Mars, carbon dioxide gas in the center of the crystal is only 100 nanometers in diameter dust. .</ P> <P align=left> ESA experts is through "Mars Express" was installed on the SPICAM ultraviolet and infrared spectrometer found that the cloud. .</ P> <P align=left> Before that, scientists think that the height of the clouds on Mars are very low, and some are even approaching the surface of Mars. .</ P> </ p>.