Why are craters on Earth less evident than those on other terrestrial planet's surface.?
85952
(You probably mean NON-terrestrial planets.)  Craters (whether you mean meteor craters or valocanic craters) on earth are less evident because they are constantly being eroded by weather effects such as wind, rain including floods, and geological activity such as volcanoes and plate tectonics.  The moon for example, does not have any of that, so the only thing that might make meteor craters less evident is another later meteor strike.
937495
We do have them in the day, just they not show up as well. Many seem more numerous before dawn, because they best seen then or the angle they hit the atmosphere at that time. All I know.
933431
The Moon is spherical, so of course half of it's hidden all the time. The Moon's in a tidally locked orbit as well, so the same face is always towards Earth; 44 percent of the Moon's surface can never be seen from Earth.\n\nBut I don't think that's what you were asking. I think you were asking why the Moon looks like a sliver. It's also simple: the Moon is lit by sunlight. You will notice the bright part of the Moon ALWAYS, without exception, points at the Sun. (Sometimes you can faintly see the side away from the Sun; this faint illumination is sunlight bouncing off Earth's clouds and feebly illuminating the Moon through radiosity.)\n\nTo demonstrate the phases of the moon, get a ball and a lamp in a darkened room. Hold up the ball in front of you and turn around. Notice the phases of the ball, just like the Moon.
1123491
very simple, land had widely different albedo's.\nthis is the amount of energy which is absorbed and re-emitted as heat. The ocean has a fairly constant albedo, where as on land you have different coloured rocks, which have different albedo's.\nTrees, grass, black soil, all have different albedo's. This varying amount of energy gives rise to different amounts of convective heating of the air above it.\n\nEvery try walking from grass onto a sandy beach on a sunny day? well then you have first hand experience of the difference in absorbed energy and albedo.\n\ndo a web search for albedo, here is the wiki entry for it\nhttp://en.wikipedia.org/wiki/Albedo
902878
1.Sunspots and Solar Flares are two "surface features".\nsunspots are created due to intense magnetic emissions, which lower temperature and prohibit convection, the transfer of heat through fluids (liquids and gases)\nSolar Flares are violent explosions within the atmosphere of the sun, which eject superheated plasma at over 1 million miles an hour. the flares also emit all forms of electromagnetic radiation, from short wave gamma radiation to long wave radio.\n\n2. Up until the mid-19th century, the light parts (terrae) and dark parts (mare) were thought to be land masses and oceans respectively.\nA theory propagated in Nazi Germany was that the moon, and other celestial bodies, were made of ice.\nUp until the 1950's, it was not completely accepted that the features of the moon were impact craters. Now we know that they truly are craters left over from meteor impacts, the youngest of which are hundred of thousands to millions of years old.\n\n3. What Shoemaker meant was, that since the Moon has no atmosphere, there is no chance of erosion or weathering affecting the features.\nCraters and debris pile up, never changing, just being overlapped by newer events.\n\n4. "Sunshine" Is called an Exothermic thermonuclear reaction (nuclear fusion). The exothermic fusion events happen in the core, where hydrogen is converted into helium, helium into carbon, and carbon into iron.\nThe heat energy created by fusion in the core then travels trough the rest of the layers of the sun before escaping as light and other forms of energy.\n\n5. There is a large amount of Iridium found in the fossil layer of around 65 million years ago, and Iridium (very rare on Earth) is abundant in asteroids.\nChicxulub Crater is an ancient impact crater buried underneath the Yucatan Peninsula. Geologic studies have found that the age and chemical composition of the crater corresponds with the hypothesized asteroid that hit Earth 65 million years ago.\n\n6. The moon is tidally locked in orbit around the Earth, so that as it rotates, we rotate, so that the same face is always pointing toward us. The moon rotates and orbits completely around the Earth every four weeks, so that is why we never see the far side. \n\n7. Mercury and Pluto would have the most in common with the Moon, due to their lack of atmosphere. Mars is semi-similar to the Moon, due to the lack of water available to erode the topography.\nEarth and Venus are the least like the Moon, due to their rather violent atmospheres.\n\n8. Contrary to popular belief, the Earth is NOT closer to the sun, any time of the year. Its orbit is described as elliptical, but only because it is not a perfect circle.\nSince the Earth is tilted, currently in Washington it is autumn, but it is spring in Australia.\nThe Northern Hemisphere is angled so the suns rays are less direct in hitting the face of the planet, and the Southern Hemisphere is angled so the rays are more direct.
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It is partly a matter of scale, and partly because of local relief in the landscape. \n If you were to stand on a perfectly flat plain or on the surface of an ocean, the farthest point you could see would be approximately 30 miles distant.  \n Also, because of changes in elevation over smaller distances, and/or obstructions to our field of vision, we tend to see even smaller 'chunks' of curvature, which our brains interpret to be flat.
562255
Physical Characteristics\n\nThe study of the moon's surface increased with the invention of the telescope by Galileo in 1610 and culminated in 1969 when the first human actually set foot on the moon's surface. The physical characteristics and surface of the moon thus have been studied telescopically, photographically, and more recently by instruments carried by manned and unmanned spacecraft (see space exploration). The moon's diameter is about 2,160 mi (3,476 km), somewhat more than 1/4 the earth's diameter. The moon has about 1/81 the mass of the earth and is 3/5 as dense. On the moon's surface the force of gravitation is about 1/6 that on earth. It has been established that the moon completely lacks both water and atmosphere. The surface temperature rises above 100°C (212°F) at lunar noon and sinks below −155°C (−247°F) at night. The gross surface features of the moon are visible to the unaided eye and were first studied telescopically in 1610 by Galileo.\n\nSurface Features\n\nThe lunar surface is divided into the mountainous highlands and the large, roughly circular plains called maria (sing. mare; from Lat.,=sea) by early astronomers, who erroneously believed them to be bodies of water. The smooth floors of the maria, varying from flat to gently undulating, are covered by a thin layer of powdered rock that darkens them and accounts for the moon's low albedo (only 7% of the incident sunlight is reflected back, the rest being absorbed). The brighter regions on the moon are the mountainous highlands, where the terrain is rough and strewn with rocky rubble. The lunar mountain ranges, with heights up to 25,000 ft (7800 m), are comparable to the highest mountains on earth but in general are not very steep. The highlands are densely scarred by thousands of craters—shallow circular depressions, usually ringed by well-defined walls and often possessing a central peak. Craters range in diameter from a few feet to many miles, and in some regions there are so many that they overlap or several smaller craters lie within a large crater. Craters are also found on the maria, although there are nowhere near as many as in the lunar highlands. Other prominent surface features include the rilles and rays. Rilles are sinuous, canyonlike clefts found near the edges of mountain ranges. Rays are bright streaks radiating outward from certain craters, such as Tycho.\n\nMare and highland rocks differ in both appearance and chemical content. For example, mare rocks are richer in iron and poorer in aluminum than highland rocks. The maria consist largely of basalt, i.e., igneous rock formed from magma. In the highlands the majority of the rocks are breccias—conglomerates formed from basaltic rock and often studded with small, green, glassy spheres. These spheres probably were formed as the spray of molten rock, originally melted by the heat of meteorite impact, recongealed in midflight. The exposure ages of some rocks (the time their surfaces have been exposed to the action of cosmic rays that produce radioactive isotopes) are as short as 50 million years, much shorter than their crystallization ages. These rocks may have been shifted in position by meteorite impact or seismic activity (moonquakes). However, present lunar seismic activity is very low, corroborating the image of the moon as an essentially static, nonevolving world.\n\nInternal Structure\n\nDiffraction of seismic waves provided the first clear-cut evidence for a lunar crust, mantle, and core analogous to those of the earth. The lunar crust is about 45 mi (70 km) thick, making the moon a rigid solid to a greater depth than the earth. The inner core has a radius of about 600 mi (1,000 km), about 2/3 of the radius of the moon itself. The internal temperature decreases from 830°C (1,530°F) at the center to 170°C (340°F) near the surface. The heat traveling outward near the lunar surface is about half that of the earth but still twice that predicted b
209347
"...Small stones to a few millimeters in size are slowed down so much by the atmosphere that they end up drifting slowly to the ground. \n\nPieces of space rock of a few millimeters to a few centimeters burn up completely in the atmosphere of the Earth before they can reach the ground, and can be seen at night as falling stars. If it is sufficiently dark and clear outside, then you can see a few falling stars every night. \n\nIf the rock is bigger, then part of it can survive the trip through the atmosphere and reach the ground as a meteorite. If the stone weighs less than a few tons, then it doesn't fall very fast anymore in the end, and it makes a small dent in the ground.   "\n\nhttp://www.phys.uu.nl/~strous/AA/en/antwoorden/meteorieten.html
830739
http://www.msnucleus.org/membership/html/k-6/uc/solar_system/4/ucss4_2a.html\n\nSome lunar craters are cut by rills, which are cracks in the surface. Rills may be faults, possibly caused by ancient tectonic activity or cooling processes.\n\nWeathering is indeed done on the moon by the intense Solar Radiation that bombards the lunar surface daily.  Temperatures on the Lunar surface vary widely on location. Although beyond the first few centimeters of the regolith the temperature is a nearly constant -35 C (at a depth of 1 meter), the surface is influenced widely by the day-night cycle. The average temperature on the surface is about 40-45 C lower than it is just below the surface.\n\nIn the day, the temperature of the Moon averages 107 C, although it rises as high as 123 C. The night cools the surface to an average of -153 C, or -233 C in the permanently shaded south polar basin. A typical non-polar minimum temperature is -181 C (at the Apollo 15 site).\n\nThe Lunar temperature increases about 280 C from just before dawn to Lunar noon.  Average temperature also changes about 6 C betwen aphelion and perihelion.  Meaning the closest and furthest the moon comes to; and far away it gets from the sun.\n\nLunar Temperature Differences\nhttp://www.asi.org/adb/m/03/05/average-temperatures.html\n\nLunar Soil\nhttp://epsc.wustl.edu/admin/resources/meteorites/regolith_breccia.html\n\nLunar Regolith and Fragmental Breccias\n\nRegolith is the name given to the layer of unconsolidated material at the surface of a planet – the loose stuff that overlies the solid rock.  On Earth, soil is part of the regolith, and lunar regolith is consequently often called “soil.”
866476
The reason you can see them is because they are falling....\nVery quickly down through the atmosphere...\nFast enough to burn them up...\nAnd the fact that they mostly burnout in a second is testement to the fact that the vast majority of these objects are much too small to make it to the ground before they are vaporized....\nSome do however... but then they are called meteorites...\nAt if one does fall on you its probably going to hurt...
865138
The plane of the orbit of the moon is close to the plane of the ecliptic, so the curve of the earth takes you a little bit closer to the moon in the tropical regions.  Therefore: Hawaii.\n\nBut it's not a big effect---not big enough to be noticable by eye.  The moon appears almost the same size from everywhere on earth.
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How can we ever know that until we discover it?=D\n\nNo. Technically, with satellite technology, all land has been "discovered" since it has all been photographed. However, there are certainly many areas of the world that remain unexplored by the "civilized" world. And perhaps that's all for the best...
208035
Relative position in the sky. The earth's atmosphere helps distort the size as the moon is "lower" in the sky, so then it appears larger.
1150565
Nasa has quite apparently manipulated the light and shadows on the second set of photographs so that the features of the face cannot be properly seen from that angle.  I suggest you investigate these matters on the web.  IMO both the moon, Mars, and Iapetus show signs of ancient ruins of one type or another.  I highly recommend the following site.  Perhaps Iapetus was the Ark that brought us here, Mars was our "Eden", and Earth is where we ended up when paradise was lost.
725184
Great question. The light from the Sun is only part of the answer. The Moon has had its surface  pounded by meteor impacts. These throw up molten droplets of rock which cool and solidify as small glassy spheres and drop back onto the surface, As there is no atmosphere on the Moon the particles don't get blown around and abraded (which would make them dull). So a lot of the Moons surface is covered with a layer of highly reflective particles and thats why its so bright.\nThe lines painted down the road work on the same principal. The paint contains small, round glass particles to make it highly reflective whereas the road remains dark.
66192
It is due to the slight orbital eccentricity of Earth rotation around the Sun. Since the orbit is not perfectly circular the distance between the two bodies varies.
32808
initially the land formation did resemble a face but later pictures taken with better resolution proved that it was just an optical illusion from poorer quality pictures-although i'm guessing your not asking weither there is a real face on mars! :)