Very Large comet may hit Mars in Oct 2014 - Page 5 - TigerDroppings.com

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J Murdah
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re: Very Large comet may hit Mars in Oct 2014


I just hope I get to see a supernova in my lifetime. I think the last one was about 4000 years ago or something.





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PoppaD
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re: Very Large comet may hit Mars in Oct 2014


Watching that video made me think of how close of a call this is for earth. I know mars is a long way away but seeing it possibly line up in the trajectory of mars like that makes you feel pretty small. When something like that hits the earth we don't stand a chance.





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Darth_Vader
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re: Very Large comet may hit Mars in Oct 2014


quote:

When something like that hits the earth we don't stand a chance.


Without a doubt. A 30 mile wide comet is what is known as a "planet killer". There's not much chance that even microbial life would escape. anything that was not wiped out immediately of the initial blast would be not be able to survive the aftermath of such an impact.






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GeorgeTheGreek
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re: Very Large comet may hit Mars in Oct 2014


We'd nuke and laser that shite to death.





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Darth_Vader
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re: Very Large comet may hit Mars in Oct 2014


quote:

I just hope I get to see a supernova in my lifetime. I think the last one was about 4000 years ago or something.


Just watch the massive red giant known as Betelgeuse. It's in the Orion constellation and is could go supernova at any time. in fact it may already have and we're just waiting on the light from the event to reach us (it's a little over 600 light years away). Which in astronomical terms is virtually in our back yard. Once it does go supernova, scientist expect that we will be able to see it even during daylight hours.

To give you an idea of the size of this star, take a look at this...



(if you're looking for our sun in that illustration, it's the little spec at the tip of the tiny arrow.)






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blueboy
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re: Very Large comet may hit Mars in Oct 2014


quote:

Without a doubt. A 30 mile wide comet is what is known as a "planet killer". There's not much chance that even microbial life would escape. anything that was not wiped out immediately of the initial blast would be not be able to survive the aftermath of such an impact.

They should make a movie about that.

And really, would you want to know about it beforehand?






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Darth_Vader
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re: Very Large comet may hit Mars in Oct 2014


quote:

We'd nuke and laser that shite to death.


Actually, that may make a one big problem into numerous smaller, but still bad problems if it's not done correctly.

Shoemaker Levy broke up into over 20 pieces before hitting Jupiter and still left impact scars bigger than our planet. And that comet was only 3 miles across, this one approaching Mars is over 30 miles across.

The best thing to do instead of trying to destroy something like this is to divert it's trajectory to make it miss. There are two lines of thinking on how to do this.

(1) Hit it with something huge or powerful enough to not destroy it but to change it's trajectory. Think of a pool ball being shot at a moving pool ball to keep it from hitting another pool ball. This could be done (in theory at least) by hitting it at a precise angle and point with a massive space probe (kinetic energy) or with a series of nuclear missiles. The inherent risk with this approach though is the very real possibility there would be huge chucks blown off the comet and these would then impact the planet. The reason for this is that comets are not very well put together. Scientist liken them to very dirty giant ice & snow balls.

The other object is to put a object in orbit around the comet that is large enough to affect the comet's speed. in essence the object would slow the comet down so that it's path and the planet's path would not intersect at the same time. This method, like the one described above, is still just theory though. Truth be told, were this comet heading for us instead of Mars, nobody can say for sure if we could do anything about it.






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Crow Pie
New Orleans Saints Fan
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Member since Feb 2010
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re: Very Large comet may hit Mars in Oct 2014


quote:

This, now I'm reading about this Oort Cloud.


The Sun is really a lot bigger than I thought it was. We are pretty "lucky" to be here at this moment in time.






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228Tiger
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Harrison County
Member since Feb 2012
12112 posts

re: Very Large comet may hit Mars in Oct 2014


So what you're saying is that Mars will have a big scar that will be ripe for the soil observing robots



Sweet






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Darth_Vader
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re: Very Large comet may hit Mars in Oct 2014


quote:

The Sun is really a lot bigger than I thought it was. We are pretty "lucky" to be here at this moment in time.


The sun is massive to us at least, but as far as stars go though it's actually on the small side. If you look up a few posts (maybe on the page before this) I posted an illustration to show the size of a nearby Red Giant star named Betelgeuse that is expected to go supernova at any moment. Next to it the sun is no more than a speck. And while Betelgeuse is huge, there are other stars out there that make it look like a speck.


This shows the scale of the earth to the sun.


This shows the scale of the sun to VY Canis Majoris (the largest known star in the universe)






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When in Rome
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re: Very Large comet may hit Mars in Oct 2014


quote:

Betelgeuse
lol







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Darth_Vader
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re: Very Large comet may hit Mars in Oct 2014


quote:

So what you're saying is that Mars will have a big scar that will be ripe for the soil observing robots Sweet


Actually, that's may not be possible for several thousand years. If this 30 mile wide comet were to hit Mars it will throw up massive amounts of what use to be the Martian crust so far there will be a huge debris field surrounding the planet, making it impossible to send anything to the planet. This debris field will eventually form a ring (or rings) around Mars like the ones we see around Saturn, but that will take at least a few thousand years.






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When in Rome
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re: Very Large comet may hit Mars in Oct 2014


Where does the Mars rover factor into all of this?





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doublecutter
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re: Very Large comet may hit Mars in Oct 2014


Darth, fascinating stuff.





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Darth_Vader
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re: Very Large comet may hit Mars in Oct 2014


quote:

Betelgeuse


quote:

lol


I have always found ti funny they chose to name that character after a nearby red giant star.

One other interesting thing abut Betelgeuse (the star one) is that once it does go supernova, there is a small chance it will wipe out all life on earth.

Following the supernova, what will remain is a tiny object known as a neutron star. and by tiny, it will only be about 20 miles across. The problem though is the massive jets of gamma rays bursts it will have shooting from it's North and south poles. If one of these jets happens to be pointing at earth, it could burn off most of our atmosphere and end virtually all life on the planet.

Here's what it's supposed to look like.







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When in Rome
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re: Very Large comet may hit Mars in Oct 2014








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Darth_Vader
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re: Very Large comet may hit Mars in Oct 2014


quote:

Where does the Mars rover factor into all of this?


It will be obliterated. Really, if this thing hits (and it's not certain it will) our exploration of Mars will probably be brought to a screeching halt.






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doublecutter
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re: Very Large comet may hit Mars in Oct 2014


Since it is 600 light years away, would it take tthe gamma rays that long to effect earth?





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When in Rome
USA Fan
Telegraph Road
Member since Jan 2011
25226 posts

re: Very Large comet may hit Mars in Oct 2014


Damn, that sucks. How long does its data take to reach NASA? If it does hit, it would be interesting to see the last few readings the rover takes before it's obliterated





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Darth_Vader
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re: Very Large comet may hit Mars in Oct 2014


quote:

Since it is 600 light years away, would it take tthe gamma rays that long to effect earth?


It would actually take just over 600 years for them to reach us, and they may already be on the way for all we know since what we're actually seeing of Betelgeuse right now is how it was 600 years ago. Gamma ray bursts are one of the fastest things in the universe. They travel at 99.9% the speed of light. So this mean we'd see the flash of the supernova (a star can actually outshine an entire galaxy briefly during a supernova) and if (and this is a big if) the resulting neutron star happens to have one of it's poles pointed at us, the first gamma ray burst will reach us almost immediately. You won't actually see it though. What you will see is how they interact with Earth's gravitational field. The sky will probably look like very vivid auroras.






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