Saturday, 17 January 2015

Surface Of The Moon


The Moon has a spherical shape as a whole, but the irregularities which should define the exact shape of solenoid (the equivalent of the geoids for the Earth) are still being studied, using satellites Lunar Orbiter that reveal changes in gravity and density in various parts.

It is also observed with the naked eye the Moon has some large dark spots.

A small telescope is sufficient to highlight the features of the lunar landscape. The `` sea '' are of great extensions of rocks similar to basalt. The ancients did not have them watched and Galileo was the first to reveal them by giving them special names with Serenitatis, Nectaris etc.

 The seas are virtually absent hemisphere invisible to us, as revealed probes. The `` amphitheaters or circuses '' are circular depressions with diameters measuring from just over 200km telescopic and are surrounded by ramparts generally steeper toward the inside, are numerous, so that the surface of the Moon appears pitted, as devastated by a terrible bombing. In total these circuses would be about 30,000 and often in a circus is an isolated peak. 

The `` crater '' are much more numerous circuses and much larger than the terrestrial ones: in fact, the largest terrestrial crater measuring 5km in diameter, while the moon there are some with a diameter of at least 150km. These craters, unlike the circuses that are low on the lunar surface, may be located at a height of 2000m and beyond.

Since the moon is not possible to refer to a zero level (such as the sea level here on Earth), was taken as the base point for all measurements, the horizontal and vertical bottom of the crater Molesting 

A, which is located almost in center of the hemisphere visible and to which cartographers have assigned a height difference of 7km from the edge. It can be said that there are around the moon it atmosphere or water since the mountains are not weathering and during eclipses do not have the slightest deformation of the outline of the moon. The temperature of the Moon is excessive: it presents the maximum and minimum 120gc -150gC.

The color of the moon can be said that the name of "silver disc" is wrong because its color tending to pale yellow. The color is not uniform, due to the irregularities of the surface and the interaction with the Earth: it is said that the light came from the Sun to Earth, is reflected by this on the moon, in turn, reflected towards the Earth. This light is very weak, because for the Earth, the relationship between the amounts of light receives from the Sun and the one that it reflects is 0.45 and the ratio analogous to the Moon is 0:07. Because the Moon can be faintly visible even during the new moon.

The crescent Moon has a higher brightness to the average, and this makes it look bigger. At the Observatory has detected that the Earthshine is greater when the "solar wind" is richer than protons; it is therefore a phenomenon of luminescence similar to that which some chemicals present when certain chemicals are affected by ultraviolet or X. Another typical conformation of the Moon rays are the, thin streaks of clear powder, which depart as rays, from the craters larger and younger; it is thought that they are formed due to the impact of meteorites that crushing rocks. The entire lunar surface is covered with debris, caused by weathering, but certainly not from the degradation of space, that is, by the continuous abrasion caused by meteorites.