SSS Mercury - near the poles, and the only explanation...

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Solar System Summary 3: Mercury ASTR 1101 Mercury The planet mercury is the closet planet to the sun in our solar system. Mercury has a diameter of 4878 km. This is equal to 0.39 Earth diameters. Mercury has a mass of 3.302 x10^23 kg or 0.055 Earth masses. The density of Mercury is 4.25 gm/cm^3. Mercury rotates once in 58.65 days. Mercury completes one day (one orbit with respect to the Sun) in 176 Earth days. Mercury is in many ways similar to the Moon on the surface, its surface is heavily cratered and very old; it has no plate tectonics. Temperature variations on Mercury are the most extreme in the solar system ranging from 90 K to 700 K. Craters are more evenly distributed and are separated by smooth plains than on the moon. As Mercury’s crust formed, rocks hit the surface and caused molten rock to flow out over the surface leaving the smooth plains. One weird thing about mercury and something that is a distinguishing characteristic of the surface is that there is a highly reflective spot
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Unformatted text preview: near the poles, and the only explanation could be ice, but with mercury so close to the sun, it is essentially impossible for it to be ice. (solarsystem.nasa.gov) The atmosphere of Mercury is basically nonexistent, being a very thin layer known as the exosphere. The interior of the planet is believed to be a significant amount of iron, because although the planet is small it has a strong magnetic field. Mercury does not however, have any rings or satellites. Mercury is sort of well known by having the most extreme range of temperatures and as having that weird reflective patch. Mercury was discovered around the time of the Sumerians and was thought to be two different things as the morning and evening star. Humans, other than flybys in 1974 and 1975 have not explored it, but it is too close to the sun to do any extensive research. Reference: http://solarsystem.nasa.gov/planets/profile.cfm?Object=Mercury http://www.solarviews.com/eng/mercury.htm (image)...
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SSS Mercury - near the poles, and the only explanation...

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