Which is the only object on earth that can be seen from the moon?
469465
Nah, you can't see the Great Wall of China from the moon--after all, the great wall isn't any bigger than an interstate highway, and you can't see those.\n\nAstronauts who have been to the moon say that you can't see any man-made objects from there-- you can see clouds,oceans, continents, ice caps, etc.  See the source for some quotes.
1100183
No, it is soooooooo far out of our atmosphere not a chance.  Even with a really big Microscope no.  For real?  By now that thing is gone been like 40 some years since it was put in, no cement on the moon, can't hold up.
688214
The flag placed on the moon (or any other man made object on the moon) is far too small and way too far away to be seen by any telescope on (or orbitting above) Earth, the angular size is just too small.\n\nIt can be verified mathmatically that it is impossible to see the flag with a telescope from Earth using the formula to find the minimum angular resolution size as seen through a circular aperture,\ntheta_min = 1.22 * lambda / Diameter\nwhere theta_min is the minimum angle (in radians), lambda is the wavelength of light, and Diameter is the diamter of rhe circular opening you are viewing it through.
513987
What confuses you about the moon? Most planets have them. Ours is old, lifeless, has a high reflectivity, and rotates once for every revolution (so we always see the same side). Why are you confused?
1112620
Earth.  But one of them is not a true moon.  It's only a temporary one.
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.
156878
The Great Wall of China is the only man made object seen from space, so I'd go with that
1139401
Due to atmospheric interference, it would not be possible to see any mad made object left on the moon from a telescope on the surface of Earth.\nHowever, there is a very powerful, Earth orbiting, telescope which is free from atmospheric distortions…the Hubble space telescope.  However, even this telescope, as powerful as it is, could not possibly see the flag left on the moon.\n\nUsing a little math and common sense, it would not nearly be possible to see the flag on the moon with the Hubble space telescope.\n\nFirst, let’s get some basic facts straight.\nThe Diameter of the Hubble telescope is 2.4 meters and the distance from the Earth to the moon (on average) is about 3.84 E8 meters.\n\nPretty much the only thing limiting what Hubble can and cannot resolve is diffraction through a circular aperture (i.e. how light waves interact with each other when they get to Hubble's mirror.\nThe minimum angle which a circular aperture can resolve is given by the formula,\nTheta_min = 1.22 Lambda / D\nwhere Theta min is the minimum angle, Lambda is the wavelength of light we are using, and D is the diameter of the opening.\n\nIf we assume we are using light at 500 nm (roughly the middle of the visible spectrum) and we know that Hubble's diameter is 2.4 meters, we can find the minimum angle to be,\nTheta_min = 2.54 E-7 radians.\nThis is quite a small angle by Earthly standards, but will it compare to the angle to the flag on the moon?...we'll see.\n\nHere is where I have to make an assumption, but it is a very reasonable assumption and one that will assure us that out answer is correct. Watching the moon landing videos, one can see that the astronauts placed a moderately sized flag on a pole on the moon. Although I don’t know the exact dimensions of the flag, I can assure you, it was definitely no bigger than 10 ft. But for the sake of argument and to make the numbers easier, let’s assume it was 10 feet (~3 meters).\nIf the distance between the flag and Hubble is the same (about) as the distance from the Earth to the moon, then we can calculate the angle between the top of the flag and the bottom of the flag pole as seen by Hubble orbiting Earth. The angle comes out to be about, 7.81 E-9 radians, about 30 times SMALLER than the absolute minimum angle Hubble can resolve...and this is if we assume that the flag is 10 ft, which it obviously is smaller than that in reality.\n\nPlus, Hubble was specifically designed to look at VERY distant object. Although the moon is far away, it might as well be right next to us compared to the stars/galaxies/.. Hubble is supposed to be looking at. Therefore, I don’t know exactly how it will respond looking at such a close and bright object.\n\nOne this is sure through, you could not see the flag, even with one of the best telescopes ever built operating perfectly under ideal conditions using visible light.
519780
I think would would see all phases of the Earth if you was on the moon. Just opposite from the way it is on Earth.
912286
Yes, the moon is a natural satellite of Earth.
299559
As the Moon moves along its orbit around the Earth its hemisphere toward the sun is fully illuminated.\n\nBut from the Earth we see only the hemisphere that is turned toward us.\n\nThat is, we are not seeing that hemisphere which is fully illuminated by the Sun.\n\nThat is why we see different shapes which are called phases of the moon.\n\nIn new moon day, the moon is in between Sun and Earth, and the moon’s non illuminated hemisphere is toward Earth and in the back ground of Sun’s bright light, the moon is invisible.\n\nWhen Moon is at 90 degree from the Sun, half of the illuminated hemisphere of Moon is visible from Earth. \n \nWhen Moon is at 180 degree from the Sun, full of the illuminated hemisphere of Moon is visible from Earth. We call it as Full Moon.
733532
From the earth, the lunar lander subtends an arc of .005 arcseconds, which is about 10 times smaller than the best earth-based telescopes (including Hubble) can resolve. \n\nBut it is possible, using a large telescope, to detect the return of laser light from the corner-refector arrays left on the surface by Apollo 11, Apollo 14, and Apollo15.
871631
Just the one, the moon
273995
thats a deep question today.\n\nTicker tape to the moon is a clue ;) to a  wide part of it
885918
The claim that China's Great Wall is the only man-made object that can be seen from the moon with the naked eye is one of our more tenaciously incorrect "facts," a bit of erroneous speculation which was spawned decades before we had the means to demonstrate it true, and which continues to have currency despite having long since been proved false. Some less specific versions of the Great Wall claim maintain it is the only man-made object that can be seen from "space," but although the term "space" is rather non-specific, it is not difficult to show the Great Wall claim to be false for any reasonable definition of the term.
537957
The Earth is between the moon and the Sun.  \n\nSomeone standing on the moon would see a solar eclipse.  \n\nSolar eclipse  Sun   Moon   Earth\n\nLunar eclipse  Sun   Earth  Moon
115838
The moon is very far away from the Earth.  It may be hard to imagine, but it is possible to see the moon from many different points on the earth at the same time.\n\nAlso realize that all of Earth experiences the same phase of the moon at the same time.  When we see a full moon, the people on the other side of the world are seeing the same full moon.