earth-moon rotation examples
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Initially?  The Earth and a moon as a system conserve angular momentum.  The events that formed the Earth and the Moon all imparted (or transfered) a angular momentum to the system.  Our mutual rotations about each other are a result of this angular momentum.
82611
I think that this site is really great since it is so visual:\nhttp://stardate.org/nightsky/moon/
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Moon definitely rotates on its axis and the period of its rotation is exactly equal to period of its revolution. So we always see the same face. \nIf earth was to rotate on its axis in 365 days. i.e. its period of rotation would had been equal to its period of revolution.it would always keep the same face to sun and there would be no days and nights. \n ==>>Note that the fact moon keeps same face towards earth is sufficient proof that it is rotating. otherwise if it revolves around earth, we would be seing the back of moon at some  time.
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"The moon does not circle the Earth once a day. The Earth circles the sun once a day. The Moon orbits the Earth about twice every 24 hours. That's why we have tides (high and low)."\n\nSAY WHAT?  Not even close.  There are junior high science teachers weeping over this "answer".\n\nThe earth rotates once a day on its axis.  That is the definition of a day - the time it takes for a planetary body to rotate once on its axis. \nThe earth circles the sun once a year - actually 365.24 days (which is why we have leap years).  That is the definition of a year - the time it takes for a planet to orbit the sun.  As you can tell, planetary years are longer or shorter depending on the distance from the sun.\nOur earth's axis is tilted.  The northern hemisphere is closer to the sun in the summer and farther in the winter.  This is how we get seasons.\n\nThe moon orbits the earth once every twenty-eight days, give or take an afternoon. The phases of the moon are caused by it being in a slightly different position everyday relative to the sun.  \nThe moon does cause tides - its gravitational pull causes the oceans to bulge out towards the moon.  However, there is a matching bulge directly opposite the moon.  THAT is why we have two high tides and two low tides a day.  In addition, the sun exerts a lesser pull, which interacts with the moons pull.\n\nSorry about that - had to correct the flagrant misinformation there.\n\nAs for your question - it is a weird effect, isn't it?  Especially when the moon is closer to a new moon.\n\nWhat happens is that our atmosphere scatters the light from the sun so that our sky is quite bright.(Why is the sky blue? has been discussed here many times).  However, the moon is reflecting enough light so that it is brighter than the surrounding sky and we see it.\n\nWhen the moon is less than full, there is very little light reflected off of the dark side of the moon (what light is reflected is earthshine!)  This light is not bright enough to outshine the sky.\n\nThink of a white sheet (in a dark room) that images are being projected onto.  The sheet will look opaque until someone shines a light onto it from the back that is brighter than the image projected from the front.  That is the basic effect that we are getting - the atmosphere is a sheet, with the sun and the moon both shining on to it.
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Earth rotates 360 degrees in 24 hours or 15 degrees per hour that it goes through 0,5 degrees of rotation in two Minutes\n\nClick on the URL below for addition information concening the earth rotation. See Item 17\n\nhelios.gsfc.nasa.gov/qa_earth.html \n\n. - - - - - - - - - - - - - - - - - - - - - - - - - -\n\nThe diameter is 7926 Miles\n\nCircumference\n\nc = d π\n\nc = 7916(3.141592654)\n\nc = 24900.26337 miles\n\nClick on the URL below for additional informatio concerning the circumference of the earth\n\nwww.lyberty.com/encyc/articles/earth.html \n\n- - - - - - - - - - - - - - - - - - - - - - - - \n\nSolving for earth rotation per degree in miles\n\n24900 ÷ 360 = 69.16666667\n\nThe earth  rotates 69.2 Miles for each degree of rotation. Rounded to one decimal point.\n\n- - - - - -s-
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Moon/Earth Comparison\nBulk parameters\n\n                                   Moon         Earth      Ratio (Moon/Earth)\nMass (1024 kg)                    0.07349       5.9736     0.0123    \nVolume (1010 km3)                 2.1958      108.321      0.0203\nEquatorial radius (km)           1738.1        6378.1    0.2725      \nPolar radius (km)                  1736.0        6356.8    0.2731\nVolumetric mean radius (km)        1737.1        6371.0    0.2727\nEllipticity (Flattening)          0.0012        0.00335    0.36    \nMean density (kg/m3)               3350          5515      0.607      \nSurface gravity (m/s2)            1.62          9.80       0.165    \nSurface acceleration (m/s2)       1.62          9.78       0.166    \nEscape velocity (km/s)            2.38         11.2        0.213    \nGM (x 106 km3/s2)                 0.0049        0.3986     0.0123 \nBond albedo                       0.11          0.306      0.360\nVisual geometric albedo           0.12          0.367      0.330    \nVisual magnitude V(1,0)          +0.21         -3.86          -\nSolar irradiance (W/m2)            1367.6        1367.6    1.000      \nBlack-body temperature (K)          274.5         254.3    1.079      \nTopographic range (km)               16            20      0.800      \nMoment of inertia (I/MR2)         0.394         0.3308     1.191\nJ2 (x 10-6)                     202.7        1082.63        0.187  \nRef The foll link
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They refer to different phases of the moon.  The "waxing and waning"  moon.  Try this link:\n\nhttp://www.enchantedlearning.com/subjects/astronomy/moon/Phases.shtml
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Try the site below for information and the second link for a catalog of current orbits.  It's pretty technical but it should be fun deciphering.
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Black moon.\nGo here......\nhttp://www.obliquity.com/astro/blue-new.html\nSearch engines are so cool!
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http://www.moonphases.info/full_moon_calendar_dates.html
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1) all three can happen, but most 'common', or at the most angles, the answer is refracted.\n\n2) b.  The example I usually give is shaking a slinky back and forth.\n\n3) mohorviric discontinuity, or moho for short.  It's about 6 km for ocean crust, and 30 km for continental crust.\n\n4) d for sure!
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The phase of the moon changes with your location. Here is a page to help you figure it out for where you live...\nhttp://aa.usno.navy.mil/data/docs/RS_OneDay.html
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There are already globes with a circling moon. Or you can use a wheel with the Earth at the hub and the moon on the rim the sun can be fixed so a lamp will work. From the top, North, the Earth circles the sun counter-clockwise and the moon circles the Earth counter-clockwise.
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rotation of earth causes days and nights and also effect in high tides and low tides across the seas.\n\nrevolution of earth result into years and centuries.\n\none rotation of earth take  24hrs=1day\none revolution takes 365 days
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Two factors at least determine the spin rate of the Earth. The orbital distance from the Sun where the solid material condensed to form the Earth's body had a fundamental orbital velocity around the sun. As these materials coalesced into the Earth, they had to maintain the energy of their momentum during accretion. This resulted in the basic rotational speed of the solid Earth. Second, the Moon has an effect on the Earth. Since the Earth is about 80 times heavier than the moon, most of this effect is upon the Moon, which now turns at a rotational speed which places the heaviest side always facing the earth. On Earth the moon provides a slight attraction which is most easily seen in tides. This gravitational force is slowing the rotation of the Earth slightly. A possible 3rd factor is if the moon is the result of an impact of a large object on the Earth which caused ejected material to coalesce into the Moon. Such a large impact would effect the rotational speed of the Earth. Or the Moon may be a sister condensation that formed at the same time as the Earth and spun off into its current orbit. This would carry off material and momentum and set the Earth spinning as well.\nIn any case, momentum must be preserved. The final result is the current rotational speeds of both the moon and the Earth.
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http://erg.usgs.gov/isb/pubs/booklets/usgsmaps/usgsmaps.html#Satellite%20image%20maps\ntry this, if not, explore more of usgs.gov. \nthen order
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Countries on the southern hemisphere. Think about the tilting earth as it orbits. Australia would be a good example.