Put it this way: It's been calculated that it took a world roughly the mass of Mars striking the protoearth to create the Moon. To be sure, you wouldn't have wanted to be anywhere around at the time (assuming you went way, way back in your time machine) but even that just shaved a bit off the top of the planet.

Of course, there's nothing like that around these days that could hit Earth (sorry, bmpbmp) and if you want to do a good job shattering the world, it would take something either larger or faster. It takes a lot of energy to disrupt a planet the mass of Earth.

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I say there is an invisible elf in my backyard. How do you prove that I am wrong?

Disclaimer: Avatar is not an official NASA image and does not imply any specific interplanetary or interstellar capability.

The Leif Ericson Cruiser

Not sure what that first phrase is, but... I agree with you. Without oxygen, it ain't gonna happen. Even that PA coal fire is absorbing the oxygen very slowly through the ground. But only fast enough to keep it smoldering.

As far as the heating of the earth... The worst effect would be that it would just melt. Lots of changes, destruction and uncomfortableness(?), but no global "event".

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Numbers are not case sensitive. (me)

I think you need to address other variables before buying into that too much. For instance, if you use a large enough projectile, I don't think it matters where in the head it is hit - it will explode.

That might not even be the best word (explode) since it might insinuate the head is made of explosives. Rapid expansive fragmentation caused by application of extreme external force might be better.

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Don of Borg - Cool, Calm, Collective.

"Within the next generation I believe that the world's leaders will discover that infant conditioning and narco-hypnosis are more efficient, as instruments of government, than clubs and prisons, and that the lust for power can be just as completely satisfied by suggesting people into loving their servitude as by flogging them and kicking them into obedience." -- Aldous Huxley

The other way is if the person has an inflated ego...the head will pop.

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Numbers are not case sensitive. (me)

You might be onto something there. If you watch certain movies it does appear that some people's heads are made out of explosive. I've often suspected that stormtrooper armour is actually made out of plastic explosive which would explain why only a graze will kill them while Princess Leia and R2D2 can get shot with aparently no lasting damage.

(Perhaps I should point out that Hot Fuzz was not a very serious movie.)

I thought the current train of thought gave Earth enough migratory distance to survive the expansion?

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The last time I felt a warm fuzzy feeling, I was informed by my doctor that it was just gas.

The earth will very very slowly move away from the sun as it loses a small amount of its mass, and this will slow the earth's warming by a small amount, but it will be nowhere near enough to cancel out the effect.

Responding to title:
Gosh, I hope not.

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I want to go back to the moon.
I don't care which rocket you use, whichever one you pick, I'll like it, I swear.
"If you think the LHC will create black holes, you might as well believe Hobbits are at the bottom of your garden."- Dr. Mike Inglis
Rovers forever! - ToSeek

I saw ToSeek get ToSeeked just the other day. It's happened a few times before, too. If that doesn't make Earth explode, a little extra heating won't, either.

. . . because that's where you keep all your stuff?

__________________
I say there is an invisible elf in my backyard. How do you prove that I am wrong?

Disclaimer: Avatar is not an official NASA image and does not imply any specific interplanetary or interstellar capability.

The Leif Ericson Cruiser

Yeah! I mean, come on!

it's just...c.o.m.e .o.n!

:

you'd need a mass-of-the-core chunk of antimatter to really make the earth go bang (well maybe a bit less, but still a lot)

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"Bessie Braddock to Churchill "Winston, your drunk!"
Churchill: "Bessie, you're ugly, and tomorrow morning I shall be sober""
the solar system

No, silly Van Rijn, I keep my stuff at home.
I hope Earth doesn't blow up as I'm currently studying it and would not like to have my research rendered useless, especially as the Council would give me heck. Plus, you guys seem like such a nice species.
P.S. I do not understand these invisible elves of which you speak. We do not have them where I am from.

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I want to go back to the moon.
I don't care which rocket you use, whichever one you pick, I'll like it, I swear.
"If you think the LHC will create black holes, you might as well believe Hobbits are at the bottom of your garden."- Dr. Mike Inglis
Rovers forever! - ToSeek

kaiyeves are you from another planet? If the Earth exploded all you would care about is your research? Wouldn't you care about loved ones or better yet wouldn't you be died? All of us would be dead so we wouldn't have time to reflect on what happened we would all be 6 feet under. Is it just me or did what kaiyeves say just completely throw you of too and who is this council your freakin me out, but if you where a alien that would be so awesome. This is turning into a good conversation.

At least Earth isn't blocking your view. Those pesky Martians are who we really have to watch out for.

There's another planet of roughly the same size in the neighborhood, where objects made of most "solid" metals would MELT. Did whoever came up with the idea not notice that other planet's non-exploded nature?

Is everyone crazy here. I would love to find martians. You have to show me proof statistics or something. Are you just kidding?

sorry,couldn't resist.....

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"An armed man is a citizen
An unarmed man is a subject"

Robert A. Heinlein

"So Long,.....and thanks for all the fish!!"

We've discussed Thomas Chalko and this idea years ago in this thread. I looked into what he did and he doesn't know how derive an equation.

If you stick around awhile, you'll probably be able to tell when most regulars are being serious and when they're joking around. Also, this is the "Off-Topic Babbling" forum. In Q&A, for example, there will be a substantially more serious tone.

__________________
I say there is an invisible elf in my backyard. How do you prove that I am wrong?

Disclaimer: Avatar is not an official NASA image and does not imply any specific interplanetary or interstellar capability.

The Leif Ericson Cruiser

So your saying that in off topic babling people at like idiots but in Q&A people act like regular people, interesting my research on the human race hasn't been completely in vain.

You might do better here if you remove that chip from your shoulder.

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I say there is an invisible elf in my backyard. How do you prove that I am wrong?

Disclaimer: Avatar is not an official NASA image and does not imply any specific interplanetary or interstellar capability.

The Leif Ericson Cruiser

6 feet under what? It's all blown up.

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Numbers are not case sensitive. (me)

Beat me to it.
Dam you NEOWatcher, dam you.
Wait a moment, all dams will be lost also.
(This is a joke.....I can spell....I intentionally used dam, instead of damn/darn...thought I would point that out before someone flamed me)

What are you saying?

My ego is no bigger than . . .

BOOM!

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Don of Borg - Cool, Calm, Collective.

"Within the next generation I believe that the world's leaders will discover that infant conditioning and narco-hypnosis are more efficient, as instruments of government, than clubs and prisons, and that the lust for power can be just as completely satisfied by suggesting people into loving their servitude as by flogging them and kicking them into obedience." -- Aldous Huxley

Now I'm having fun thoughts of the Python skit where people try not to be . . .

BOOM!

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Don of Borg - Cool, Calm, Collective.

"Within the next generation I believe that the world's leaders will discover that infant conditioning and narco-hypnosis are more efficient, as instruments of government, than clubs and prisons, and that the lust for power can be just as completely satisfied by suggesting people into loving their servitude as by flogging them and kicking them into obedience." -- Aldous Huxley

It impossible because it would take 10*10^32 joules on enegry to break apart the earth gravity strength.

Well, yeah, that´s the problem with planet Krypton exploding like a bombshell in Superman, the movie. I can´t think of anything that could cause such an event. Not even a collision with a moon-sized object would do.

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What brings us together is stronger than what pulls us apart

Also the added gravity from the moon sized object would make it harder.

What about a 10 km asteroid accelerated to 99 percent of c?