Moon moving away from Earth

[Naru523]

The moon, the fifth largest moon in our solar system, has been going out of Earth gravity by going out half an inch each year. If it does, Earth's axis will rapidly change by the planets gravity, by example the equator is icey and the poles warm. Also, the Sun will be the boss for tides. Humans on earth may get a short life time.

EDIT: Found the video: http://www.youtube.com/watch?v=dnSVpwJgvP8&feature=channel

[Chaotic Cow]

I've heard about this.

Did it say how long before we notice any effects of the moon getting further away?

[atomic7732]

1.Earth's axis will rapidly change by the planets gravity
2. Humans on earth may get a short life time.

1. No.
2. No, we will be forced to migrate, our axes don't change fast anyway. This is the case with Mars.

[monmarfori]

Without the moon. we cannot see some phases like full moon.

[Chaotic Cow]

Is there a way to simulate this in US?

Be cool to see the possibilities the moon will travel when it leaves orbit.

[space guy1]

i saw several shows that said that too.   also eventually the moon will slow earths rotation so that the earth will be tidally locked to the moon.   and in a long time (billions of years?) the earth will rotate more slowly than the moon and tidal forces will cause the moon to fall into the earth, make an extremely close pass and be flung out of earths gravity, or almost hit the earth and break up into a ring of particles around the earth. if i had to choose one of the three to happen i would choose the third it would be awesome if earth had its own rings.

[Chaotic Cow]

Yes. Earth getting it's own rings due the to the moon breaking up.

Epic.

[witold]

Is there a way to simulate this in US?

Be cool to see the possibilities the moon will travel when it leaves orbit.

Method 1:Increase time step to "too high"
Method 2:Decrease mass of Earth about 30%-90%

[monmarfori]

This will occur in million or billion years.

[atomic7732]

Is there a way to simulate this in US?

Be cool to see the possibilities the moon will travel when it leaves orbit.

Method 1:Increase time step to "too high"
Method 2:Decrease mass of Earth about 30%-90%

Correctly witold.

[Naru523]

FOUND IT! http://www.youtube.com/watch?v=dnSVpwJgvP8&feature=channel

[Chaotic Cow]

Awesome Naru!

This seems to be based on if the moon just "Poofed"

not exactly slowly going away.

Atleast thats what the beginning been saying.

[Naru523]

if i had to choose one of the three to happen i would choose the third it would be awesome if earth had its own rings.

Yes. Earth getting it's own rings due the to the moon breaking up.

Epic.

Roche Limit? lolwut.

[Naru523]

Well, in some later parts it did said the moon goes out.

[Dan Dixon]

Did it say how long before we notice any effects of the moon getting further away?

"Tidal friction, caused by the movement of the tidal bulge around the Earth, takes energy out of the Earth and puts it into the Moon's orbit...

The Earth's rotation is slowing down because of this. One hundred years from now, the day will be 2 milliseconds longer than it is now."

http://curious.astro.cornell.edu/question.php?number=124

Assuming the speed of the moon moving away from the Earth stays constant (which it isn't) it will take over 100 million years for the Moon to move 1% further away.

((384 000 km) / 100) / (3.8 cm) = 101052632

[atomic7732]

"Tidal friction, caused by the movement of the tidal bulge around the Earth, takes energy out of the Earth and puts it into the Moon's orbit...

Doesn't that make Earth get closer to the sunb?

[Bla]

"Tidal friction, caused by the movement of the tidal bulge around the Earth, takes energy out of the Earth and puts it into the Moon's orbit...

Doesn't that make Earth get closer to the sunb?

I don't think so. The Moon orbits The Earth, so first it pulls us towards The Sun (when it's between us and The Sun), then it pulls us away from The Sun, and so on.

[Dan Dixon]

"Tidal friction, caused by the movement of the tidal bulge around the Earth, takes energy out of the Earth and puts it into the Moon's orbit...

Doesn't that make Earth get closer to the [sun]?

Good question.

I don't think so. I believe that the energy removed by Tidal friction is just rotational (or at least mostly rotational).

Please correct me if I'm wrong on this.

[deoxy99]

Okay, the moon isn't going to change the earth's orbit, because it has very little mass.

[Bla]

Okay, the moon isn't going to change the earth's orbit, because it has very little mass.

It will make the Earth "wobble" slightly, like planets do to their parent stars (that's a way of discovering exoplanets, detecting how the star "wobbles"). But since the Moon is orbiting Earth, it won't move Earth's orbit, because when it get's on the other side of the orbit, it will just move Earth back.

[deoxy99]

Okay, the moon isn't going to change the earth's orbit, because it has very little mass.

It will make the Earth "wobble" slightly, like planets do to their parent stars (that's a way of discovering exoplanets, detecting how the star "wobbles"). But since the Moon is orbiting Earth, it won't move Earth's orbit, because when it get's on the other side of the orbit, it will just move Earth back.

You are right. Again.

[yami ash]

if i had to choose one of the three to happen i would choose the third it would be awesome if earth had its own rings.

surely this would wipe out a lot of life on earth, just like the dinosaurs?

[deoxy99]

The moon pulls on Earth, causing tides. So does the Sun. Tides act as brakes. Eventually, the Earth will stop rotating.