Continuing our top 10 ranges, today we will write about top 10 largest cities in the world by land area.
With the help NASA’s Messenger scientists can receive new data about Mercury, according which now they know that bursts of energetic particles in Mercury’s are a continuing product of the interaction of Mercury’s magnetic field with the solar wind.Scientists can receive image of the crater Degas with a resolution of 90 meters per pixel. In the photograph clearly visible pits across its surface.These pits are often surrounded by diffuse halos of higher-reflectance material, and they are found associated with central peaks, peak rings, and rims of craters.
According to Brett Denevi, a staff scientist at the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Md., the etched appearance of these landforms is unlike anything they have seen before on Mercury or the Moon.The X-ray Spectrometer (XRS), which is one of two instruments on Messenger, has made several important discoveries. The magnesium /silicon, aluminum/ silicon, and calcium /silicon ratios averaged over large areas of the planet’s surface show that, unlike the surface of the Moon, Mercury’s surface is not dominated by feldspar-rich rocks.This observations also showed substantial amounts of sulfur at Mercury’s surface.
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