If the moon really was blown up for some reason, I'd like to think that there would be countermeasures in place. Lets say the moon is shattered in a way that ejects several large chunks from the main body, but otherwise remains intact. The chunk in orbit would probably drift away from the earth, while the smaller pieces fall towards the earth. When this happens, There will probably be a little time to organize some fighter jets and nuclear warheads.
As the chunks of the moon enter the atmosphere, they would be intercepted by the jets (Blown to smaller pieces) While the largest are targeted by the nukes.
This would probably work, unless the rocks were moving too fast to be hit. (or if everyone's too busy freaking out)
The chunk in orbit would probably drift away from the earth while the smaller pieces fall towards the earth.
Only if its momentum were significantly changed. No matter what happens, the center of the mass of all of the pieces would still continue to follow the same orbital path at least until some of the pieces began to wander closer to the Earth (significantly closer). The size of the pieces has absolutely nothing to do with where they ultimately end up.
I swear there is no field of physics so poorly understand as orbital mechanics. It's Newtonian gravity, it's been around for over 300 years. Why do people know **** all about it?
This would probably work, unless the rocks were moving too fast to be hit.
They'd enter the atmosphere at speeds of around 10 km/s. This is 15-20 times faster than most missiles. This ignores the fact that shooting the rocks doesn't make them go away, it just turns them into a bunch of smaller rocks moving just as fast.
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Never attribute to malice what can adequately be explained by incompetence.
I swear there is no field of physics so poorly understand as orbital mechanics. It's Newtonian gravity, it's been around for over 300 years. Why do people know **** all about it?
Depending on how big the explosion was, the pieces would not continue to orbit the earth. The explosion would change the momentum of the chucks. The distance between the earth and the reduce mass of the object would not keep it in orbit. The mass of the moon and earth is not enough to keep the current moon in orbit, which is why it is falling away from the earth, about 4cm a year. If the explosion was very large, then the chucks would change momentum and scatter through the solar system. The most would hover around the earth's orbit and collide with the earth at some point in the future.
The if the explosion was very small, just enough to break the moon part, the moon would hold together reforming.
Regardless, the mass of the moon, would mostly remain in the same spot, tides would continue and most of the largest pieces would reach the Roche limit and disintegrate into smaller pieces. Those pieces would hit the earth.
The mass of the moon and earth is not enough to keep the current moon in orbit, which is why it is falling away from the earth, about 4cm a year.
No, that has nothing to do with it. The moon is receding due to a somewhat complicated interaction with the tides. The rotation of the Earth drags the tides slightly ahead of the moon in its orbit which causes the force of gravity to be offset a little bit which causes an angular acceleration, speeding the moon up and causing it to transition to a higher orbit. Simultaneously the Earth's rotation slows down as it drags through the tides, so the energy of Earth's rotation is being transferred to the moon's kinetic energy which is then being transferred to gravitational potential energy.
It's not because there "isn't enough mass", in fact it's because there's too much. If the moon were less massive it wouldn't have such a profound effect on our tides and the offset from the force of gravity would be far smaller.
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Never attribute to malice what can adequately be explained by incompetence.
if the moon blew up
it be dark at night
no tides
most of the creatures in the world would die (mostly marine creatures)
the moon stuff would circle earth making it dark in the morning
the moon stuff would smash down into earth killing lots of people
there would less salt in the world
the earth would have less earthquakes
the earth would be less oval
if the moon blew up
it be dark at night
no tides
most of the creatures in the world would die (mostly marine creatures)
the moon stuff would circle earth making it dark in the morning
the moon stuff would smash down into earth killing lots of people
there would less salt in the world
the earth would have less earthquakes
the earth would be less oval
I don't understand. What possesses people to make things up about things they know nothing about?
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Never attribute to malice what can adequately be explained by incompetence.
Hmm, Yourself, since I know very little about orbital mechanics, I basically know enough to hold a decent conversation with you, :smile.gif: , I have a question, couldn't instead of blowing up the moon, couldn't a large enough explosion just push the moon farther away from the Earth.
How much energy would be required to cause the moon to escape Earth's gravitational pull anyhow? Obviously, a whole lot, I don't even begin to know how to guess.
How much energy would be required to cause the moon to escape Earth's gravitational pull anyhow?
You'd have to roughly double the moon's kinetic energy to push it onto an escape trajectory. This is true of any body with a roughly circular orbit (the amount of kinetic energy needed to get on an escape orbit is precisely twice the kinetic energy you'd have in a circular orbit).
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Never attribute to malice what can adequately be explained by incompetence.
You'd have to roughly double the moon's kinetic energy to push it onto an escape trajectory. This is true of any body with a roughly circular orbit (the amount of kinetic energy needed to get on an escape orbit is precisely twice the kinetic energy you'd have in a circular orbit).
Ah. Thank you. That would indeed be a tremendous amount of energy.
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I have Asperger's Syndrome, a mental disorder of the Autistic Spectrum, apologies in advance if my posts seem a bit off.
A meteor of that size should have liquefied the earth on impact. A meteor only a fraction of that size would kill of all life on earth.
An object of that size created the moon. :smile.gif: Also, go look up the energy required to liquify the Earth. :smile.gif:
That awesome simulation people post a lot, is of what would happen if the impactor that created the moon hit today.
It was a mars size planetoid that smashed into where we now have the north pole. Smacked into the Earth at such a speed and angle, it bulged out the Earth's northern sections, launched part of the object into space, that eventually became the moon, and the moon formed rather fast. In a Galactic Scale, it took only 100 years I believe.
It was an event beyond the scope of which any of us can imagine.
IT also started the Earth's rotation. Because of the moon, and the impact that caused it, we are alive and well. :smile.gif:
We would not be here at all, if the moon was never formed.
Also, the Earth at that time, had 90% of it's current mass, and was a ball of magma, basically. :smile.gif:
That impact formed the remaining 10%.
So, yes, that object wouldn't destroy the Earth if it hit now. After all, that simulation was done with real science behind it. :smile.gif:
What? No it didn't. Earth bulges at the equator because it rotates. Every rotating body does this.
The Earth was likely rotating prior to that, but certainly not the way it's rotating now.
Yourself, Maybe I'm using the wrong word. Damnit, I don't know what else to use but bulge in this case. Think of it as a massive swelling from a bruise. :smile.gif:
Think of a part of the earth pushed outwards towards space because of the energy of the impact. A bulge, that's what I mean.
Here's the vid I got.
IT shows what I mean.
I remember this question from a science class quite a few years ago!
It'sthe moon that maintain the Earth's rotation, so it stays stale. Moreover, the impact it has on the Earth's rotation around the sun would mean that without it, the Earth would most likely either suddenly drift away from the sun or it would begin to get sucked into it.
So either it would mean us dying from either cold or getting fried... And no more tidal waves.
Moreover, the impact it has on the Earth's rotation around the sun would mean that without it, the Earth would most likely either suddenly drift away from the sun or it would begin to get sucked into it.
No it ****ing wouldn't. I've explained this already in this very topic. There is no physical mechanism by which the moon holds the Earth in its orbit around the sun, gravity doesn't work that way.
And no more tidal waves.
The sun causes tides as well. There would also continue to be tsunamis (colloquially known as tidal waves) since they're not typically caused by the action of the tides.
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Never attribute to malice what can adequately be explained by incompetence.
As the chunks of the moon enter the atmosphere, they would be intercepted by the jets (Blown to smaller pieces) While the largest are targeted by the nukes.
This would probably work, unless the rocks were moving too fast to be hit. (or if everyone's too busy freaking out)
Only if its momentum were significantly changed. No matter what happens, the center of the mass of all of the pieces would still continue to follow the same orbital path at least until some of the pieces began to wander closer to the Earth (significantly closer). The size of the pieces has absolutely nothing to do with where they ultimately end up.
I swear there is no field of physics so poorly understand as orbital mechanics. It's Newtonian gravity, it's been around for over 300 years. Why do people know **** all about it?
They'd enter the atmosphere at speeds of around 10 km/s. This is 15-20 times faster than most missiles. This ignores the fact that shooting the rocks doesn't make them go away, it just turns them into a bunch of smaller rocks moving just as fast.
Depending on how big the explosion was, the pieces would not continue to orbit the earth. The explosion would change the momentum of the chucks. The distance between the earth and the reduce mass of the object would not keep it in orbit. The mass of the moon and earth is not enough to keep the current moon in orbit, which is why it is falling away from the earth, about 4cm a year. If the explosion was very large, then the chucks would change momentum and scatter through the solar system. The most would hover around the earth's orbit and collide with the earth at some point in the future.
The if the explosion was very small, just enough to break the moon part, the moon would hold together reforming.
Regardless, the mass of the moon, would mostly remain in the same spot, tides would continue and most of the largest pieces would reach the Roche limit and disintegrate into smaller pieces. Those pieces would hit the earth.
No, that has nothing to do with it. The moon is receding due to a somewhat complicated interaction with the tides. The rotation of the Earth drags the tides slightly ahead of the moon in its orbit which causes the force of gravity to be offset a little bit which causes an angular acceleration, speeding the moon up and causing it to transition to a higher orbit. Simultaneously the Earth's rotation slows down as it drags through the tides, so the energy of Earth's rotation is being transferred to the moon's kinetic energy which is then being transferred to gravitational potential energy.
It's not because there "isn't enough mass", in fact it's because there's too much. If the moon were less massive it wouldn't have such a profound effect on our tides and the offset from the force of gravity would be far smaller.
Hmm, I guess our moon is A LOT more vital then I initially thought.
it be dark at night
no tides
most of the creatures in the world would die (mostly marine creatures)
the moon stuff would circle earth making it dark in the morning
the moon stuff would smash down into earth killing lots of people
there would less salt in the world
the earth would have less earthquakes
the earth would be less oval
I don't understand. What possesses people to make things up about things they know nothing about?
Fiction writing is older than
moondust.You heard that, green and red.
How much energy would be required to cause the moon to escape Earth's gravitational pull anyhow? Obviously, a whole lot, I don't even begin to know how to guess.
Also, I agree with Felthat.
You'd have to roughly double the moon's kinetic energy to push it onto an escape trajectory. This is true of any body with a roughly circular orbit (the amount of kinetic energy needed to get on an escape orbit is precisely twice the kinetic energy you'd have in a circular orbit).
Ah. Thank you. That would indeed be a tremendous amount of energy.
A meteor of that size should have liquefied the earth on impact. A meteor only a fraction of that size would kill of all life on earth.
An object of that size created the moon. :smile.gif: Also, go look up the energy required to liquify the Earth. :smile.gif:
That awesome simulation people post a lot, is of what would happen if the impactor that created the moon hit today.
It was a mars size planetoid that smashed into where we now have the north pole. Smacked into the Earth at such a speed and angle, it bulged out the Earth's northern sections, launched part of the object into space, that eventually became the moon, and the moon formed rather fast. In a Galactic Scale, it took only 100 years I believe.
It was an event beyond the scope of which any of us can imagine.
IT also started the Earth's rotation. Because of the moon, and the impact that caused it, we are alive and well. :smile.gif:
We would not be here at all, if the moon was never formed.
Also, the Earth at that time, had 90% of it's current mass, and was a ball of magma, basically. :smile.gif:
That impact formed the remaining 10%.
So, yes, that object wouldn't destroy the Earth if it hit now. After all, that simulation was done with real science behind it. :smile.gif:
What? No it didn't. Earth bulges at the equator because it rotates. Every rotating body does this.
The Earth was likely rotating prior to that, but certainly not the way it's rotating now.
Yourself, Maybe I'm using the wrong word. Damnit, I don't know what else to use but bulge in this case. Think of it as a massive swelling from a bruise. :smile.gif:
Think of a part of the earth pushed outwards towards space because of the energy of the impact. A bulge, that's what I mean.
Here's the vid I got. IT shows what I mean.
I'm crap at explaining sometimes.
And fair enough on the rotation.
It'sthe moon that maintain the Earth's rotation, so it stays stale. Moreover, the impact it has on the Earth's rotation around the sun would mean that without it, the Earth would most likely either suddenly drift away from the sun or it would begin to get sucked into it.
So either it would mean us dying from either cold or getting fried... And no more tidal waves.
No it ****ing wouldn't. I've explained this already in this very topic. There is no physical mechanism by which the moon holds the Earth in its orbit around the sun, gravity doesn't work that way.
The sun causes tides as well. There would also continue to be tsunamis (colloquially known as tidal waves) since they're not typically caused by the action of the tides.
#BAUM4EXILE2014
:^)
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