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Does the moons size change

Updated: 8/9/2023
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15y ago

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Yes, the Moon does alter in size to an Earth based observer. This is a real effect caused by the fact that the Moon's orbit round the Earth is not a perfect circle but rather it is an ellipse. The elliptical orbit brings the Moon nearer to the Earth at Perihelion and takes it further away at Aphelion thus at Aphelion it is smaller to the eye than at Perihelion. The Moon also APPEARS to be bigger to the eye when it is close to the horizon this is called the Moon illusion. The link I will place below explains this.

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15y ago
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15y ago

While it is a fallocy that the moon appears larger at the horizon than at its zeinith, it is true that the moon orbits the earth in an eliptical orbit that brings it closest ( its perigee) and farthest (its apogee) from the earth. Thus, the moon will appear larger to the observer at the moon's perigee than it will at its apogee.

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14y ago

Because it changes it's position from the sun and it doesn't it a shadow...

cuz the distance between the earth and the moon change you morronic piece of poop. what you've just asked is one of the most insanely idiotic things I have ever heard. At no point in your rambling, incoherent question were you even close to anything that could be considered a rational thought. Everyone reading this is now dumber for having listened to it. May God have mercy on your soul.

Haha, you're the retard my friend (aimed at the "answer" above)! The main reason why the moon appears to be changing in size is an illusion. The closer the moon gets to the horizon, the larger it seems. The reason is, that your eye now have something to compare with, like mountains, tress, skyline etc. It is true that the moons orbit around Earth is not a perfect circle, so the distance between the moon and Earth actually does change a bit.

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11y ago

The amount of sunlight on the Moon's surface is constant except during a solar eclipse. Just like the Earth, half of the Moon's surface is lit at any one time, as that is the amount presented to the Sun.

However, from the point of view of Earth the Moon exhibits 'phases', a periodic change in the brightness and apparent shape of the Moon. It is a misnomer to think that this changes the amount of light hitting the Moon. The new moon, the darkest phase, is simply what the moon looks like when all the light from the Sun falls on the side of the Moon facing away from Earth, preventing us from seeing it.

The amount of sunlight falling on the Moon can only be reduced by another body, such as the Earth, physically blocking the light from hitting the Moon.

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6y ago

Only during a lunar eclipse does the amount of the moon lit by the sun change. At all other times, fully half of the moon's surface is illuminated. How much of that is on the side facing Earth does change.

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14y ago

yes it goes farther away by 1 inch every year

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Continue Learning about Natural Sciences

Why do forces change on different planets and moons?

Because the mass of the planet - its weight and size - create different degrees of gravity.


How does the size of planet seem to be related to the number of moons a planet has?

Larger size seems to equal more moons. Jupiter, Saturn, and Neptune are larger than Mars, and they have many more moons.


Which is the largest out of mars two moons?

Phobos is the largest out of Mars' two moons, and is about twice the size of Deimos.


Does he size of the planet seem to affect how many moons it has?

yes


What planet is one quarter the size of earth with no moons?

It is mercury.

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Why do forces change on different planets and moons?

Because the mass of the planet - its weight and size - create different degrees of gravity.


What the size of the two moons?

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How does the size of a planet seem to be related to the number of moons a planet has?

Larger size seems to equal more moons. Jupiter, Saturn, and Neptune are larger than Mars, and they have many more moons.


How does the size of planet seem to be related to the number of moons a planet has?

Larger size seems to equal more moons. Jupiter, Saturn, and Neptune are larger than Mars, and they have many more moons.


Which of Mars' moons is bigger in size?

Phobos.


Has two moons and half the size of earth?

In terms of radius, Mars is about half the size of the Earth. It also has two moons called Phobos and Deimos


Which is the largest out of mars two moons?

Phobos is the largest out of Mars' two moons, and is about twice the size of Deimos.


Is the same size as earth has no moons and has thick atmosphere of mostly carbon dioxide?

Venus is the same size as Earth and has no moons and has a thick atmosphere of mostly carbon dioxide.


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