Why does Sun and Moon looks sae size from Earth?
95739
Because of their distance... The sun looks as big as the moon from our point of view because the sun, even though it is a LOT bigger than both the earth and moon, is very far from the earth, thats why it looks so small... just the same as you see a person approaching you from afar..
407992
No its because the atmosphere acts like a lense. When the moon is high in the sky, the atmosphere has little affect on what the moon looks like so it will be smaller, but as it gets closer and closer to the horizon, you will be looking through a lot more atmosphere, which is like a lense of a magnifying glass. Thats why when it is low in the sky, the moon is very huge looking.\n\nBy the way, just for future reference, all orbits are eliptical because a perfectly circular orbit is only theoretical, and would never occur in nature. However the moon's orbit is close enough to circular to not affect how big it looks compared to the affect the atmosphere does.
138619
it all depends of what sun and what moon ur talking about the smallest suns in the universe are call red dwarf an are very common in the universe they  are a fifth of our suns size. there is also several gigantic planets as 70 virgins which is 6.6 times bigger than Jupiter so it is highly possible that at least one of those million of gigantic planets may have a moon bigger than a red dwarf
1041670
The distance to the sun can be computed by a variety of techniques.  Trigonometry and parallax measurements were used by ancient greek and arab astronomers to come up with pretty good estimates for the distances to the sun, moon, and other planets.\n\nThe sun's diameter at its equator is about 865,000 miles, and the mean distance from the earth to the sun is about 93 million miles.\n\nThe moon's diameter at its equator is about 2,160 miles, and the mean distance from the earth to the moon is about 238,900 miles.\n\nThe ratio of the diameters is 865000 / 2160 or about 400.  The ratio of distances is 93,000,000 / 238,900 or about 390.  So the sun is about 400 times larger than the moon, but it's also about 400 times farther away - so the sun and moon appear about the same size in the sky.\n\nThe moon's orbit around the earth isn't a circle, and the lunar distance varies from about 220,000 miles to about 252,000 miles.  When it is close to the earth, the moon appears slightly larger than the sun.  When it is in the further part of it's orbit, the moon appears slightly smaller than the sun.  If an eclipse occurs when the moon is furthest from earth, the moon's disk can't completely cover the sun.  The result is an "annular" eclipse.\n\nIncidentally, the moon gets slightly farther away from the earth every year.  Eventually, in the distant future, it will be too far away to produce a total eclipse of the sun.
1087183
The moon has a side that always faces us! That's not always filled with light though. That's why we have phases of the moon.
465481
It only looks big because you have other things to compare it against, like trees and houses and things.\nNext time there's a full moon, try it with that (it's easier to observe). When it is low in the sky and looking big, hold your arm out full-length, stick out your thumb and compare your thumb nail size against the moon. Six hours later, when it is up high in the sky, do the same trick and you'll see it is actually the same size.
379155
The moon looks bigger when it is closer to the horizon. \n\nIt's an optical illusion. Our brain makes the focal point (the farthest point) of a perspective appear larger. If you look at the moon by turning your head upside-down, the moon will appear to be normal size.
647101
The Moon is 400 times smaller than the Sun, but 400 times closer.\n\nWe are very lucky
985857
GREAT QUESTION!\n\nThe answer is: In several ways.  First of all:\n\n1. Earth rocks!\n\nInstead of following a smooth Keplerian orbit around the Sun, Earth's own centroid performs an oscillatory motion about this "mean path."  By careful observations of the nearest PLANETS (but not the Moon --- why not?!) the amplitude of this Moon-induced "rocking" can be measured: Earth's centroid wobbles back and forth by about 3/4 of the Earth's own radius.  From this alone, one can deduce that the Moon's mass is ~ 1/80th that of the Earth.  \n\n[How?: From cunning arguments, the Greeks worked out long ago that the Moon was about 60 Earth radii distant; but when things are orbiting around one another with an equal but opposite force attracting them, it's the centroid of the COMBINED system that stays fixed, and the sizes of the "orbits" of both objects about their common centroid are inversely proportional to their masses --- just as though there's a giant Archimedes lever out there in space!  So that's how the "60" and the "3/4" combine to tell you that M_moon ~ M_earth/80.]  \n\nFurthermore, THAT is how it was already known in Victorian times that the gravitational acceleration at the Moon's surface must be ~1/6th that of our familiar 'g' at the Earth's surface.  \n\n[The ACTUAL PHYSICAL distance to the Moon is also needed to work this out, so that one can obtain its physical from its angular size.  You then plug the Moon's mass and physical size into Newton's Law of Gravity, applied at the Moon's surface.  Since the Greeks knew the Moon was ~60 Earth radii away, that actually meant measuring the Earth's size well!  \n\nWhen Newton made his own first "Moon check" on his law of gravity, it didn't seem to fit.  He was away home from Cambridge, in Lincolnshire, avoiding the Great Plague of 1666, and thus away from up-to-date books and other information.  But some time later, perhaps on returning to Cambridge, he learned of a new measurement of the Earth's size.  He then went back to his Moon test again, and found that when he'd corrected his earlier calculation, "it answered pretty nearly."  \n\nThat's how he first confirmed his Law of Gravity.  It tells you something about perseverance.]\n\nSo in the end, things like the acceleration at the Moon's surface were already known long before an astronaut demonstrated the "strength" of it by dropping objects on the surface of the Moon, on live television. \n\n2. The tides.\n\nAnother effect of the Moon's gravity on the Earth is of course the tides, though this is a more subtle and less direct (scientific) effect, as it's then the DIFFERENTIAL TIDAL FORCES (derived --- chuckle --- from differentiating the Moon's gravitational force at different places all over the Earth/Oceans etc.) that provide the forcing effect.  However, as we are riding on the surface of the Earth itself, we can ourselves more directly experience and observe this more subtle effect, through the tides, than we can the "rocking" produced by the stronger, main part of the attraction.\n\nI hope you get to study this some day; it's fascinating stuff!\n\n[Here's a funny thing that has always intrigued students at Starfleet Academy.  As viewed in a frame of reference in which the Sun is at rest --- the frame you use when you want to show the planets orbiting the Sun --- what do you think the path of the Moon looks like in space?  Does it spiral a lot, in overlapping circuits, around the Earth's path, or does it slowly and majestically make a gradually curving sinusoidal like motion, first curving in, then curving out (relative to the solar direction) about the essentially circular path of the Earth?  Would you believe that it always CURVES IN TOWARDS THE SUN?!!\n\nIf you know about gravity, acceleration, and the two separate orbital velocites
25342
Think rally hard. The moon has gravity just like the earth. Have you ever seen a flag on earth stand that straight? They had a metal pole across the top and the grainy video make it look as if it is fluttering.
410954
The Earth is round.\nObviously at lower latitudes you view the moon from a different angle than what you would at higher latitudes.\nSo that at the equater the moon when rising would look like a bowl from that angle in that phase.
90872
the moon doesnt circle the sun the moon circles the earth the earth circles the sun
280642
It is a coincidence.\n\nThe sun is much larger than the moon (~400 times), and yet the moon is much closer than the sun (~400 times).\nIt is remarkable coincidence that right now, as seen from the Earth, both the moon and the sun appear the same size.\nIt will not stay this way forever, the moon is very slowly moving away from the Earth, eventually it will get far enough away that it will look smaller than the sun and there will be no such thing as a total solar eclipse.
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.
957189
This is an optical illusion - It has to do with how the brain interpretes things that are in front of you compared to above you. Try this for yourself: Take a dime and hold it out in front of you to cover the moon. You will see the moon is the same size both in front and overhead.
1111188
the sun and or the moon
1023489
No.  But we see only the side that faces earth.\n\nHere's a good diagram that explains it better than I can...\n\n\nhttp://www.windows.ucar.edu/tour/link=/the_universe/uts/moon2.html