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Discussion => Philosophy, Economics and Justice => Topic started by: SealTeam6 on June 20, 2013, 04:46 am

Title: Dark Matter
Post by: SealTeam6 on June 20, 2013, 04:46 am
What kind of information can you folks give me on this, I'm very interested.

Secondly, I just saw somewhere that our Milky Way Galaxy is on a collision course with the Andromeda Galaxy, what are your thoughts?  I know its billions of years away and I may not ever see it with human eyes, but I would like to get some thoughts on our new hybrid galaxy, Milkymeda!
Title: Re: Dark Matter
Post by: PerPETualMOtion on June 20, 2013, 11:40 am
Andromeda Milk!

Dark matter... matter that doesn't reflect light. Most carbon chain compounds absorb many frequencies of visible light, including IR and going all the way into UV. There are tons of interesting organics in space to do this, although I think most of them are simple alcohols... some nitrogen compounds, too.

It is also used to fill the intellectual gap which has not yet been filled by theory and observation: the Universe seems to behave as though it is more dense than we can see. Hence, dark matter... It is a filler theory... until we get our next big discovery in the Universe....
Title: Re: Dark Matter
Post by: northsouth on June 20, 2013, 03:54 pm
Nobody can give you information on dark matter, because we simply don't understand it yet. As the guy above me said, it's a filler theory.
Title: Re: Dark Matter
Post by: echo_ on June 20, 2013, 05:02 pm
Dark matter was an invented concept created to fill gaps in the Big Bang Theory which cosmologists so loved.

After dark matter was created as a concept, astronomers later found gravitational anomalies which dark matter might explain. A lot of physicists act like dark matter is a real thing. But at this point, no one really knows.
Title: Re: Dark Matter
Post by: Kief on June 20, 2013, 05:06 pm
I don't really know much about it, but I just read the other day that a new form of dark matter been proposed (theorized) to make up 1/5 of all dark matter in the universe. 

Here's a normal web link about it. - http://www.space.com/21508-dark-matter-atoms-disks.html

Some good information on dark matter in general there aswell.
Title: Re: Dark Matter
Post by: PerPETualMOtion on June 20, 2013, 07:57 pm
I don't really know much about it, but I just read the other day that a new form of dark matter been proposed (theorized) to make up 1/5 of all dark matter in the universe. 

Here's a normal web link about it. - http://www.space.com/21508-dark-matter-atoms-disks.html

Some good information on dark matter in general there aswell.

Good stuff. (Aside: gatorade is fucking poison!)

I am immensely curious about astronomy. I like the daydream of colliding galaxies. There's some good sci-fi about how many alien races exist in our own Milky Way... I think there is some of that in the Ender's series (not just the buggers)... or that might be something else... Drake or something. No... it was Ender's Game series, maybe the third book.

Anyway, I'm more concerned over antimatter. When are we going to get a gamma ray burst from an antimatter asteroid zipping through the Universe! Beautifully scary shit.
Title: Re: Dark Matter
Post by: SealTeam6 on June 20, 2013, 09:03 pm
Andromeda Milk!

Dark matter... matter that doesn't reflect light. Most carbon chain compounds absorb many frequencies of visible light, including IR and going all the way into UV. There are tons of interesting organics in space to do this, although I think most of them are simple alcohols... some nitrogen compounds, too.

It is also used to fill the intellectual gap which has not yet been filled by theory and observation: the Universe seems to behave as though it is more dense than we can see. Hence, dark matter... It is a filler theory... until we get our next big discovery in the Universe....


I cannot wait until that next big discovery, I think it's going to be something truly mind blowing!
Title: Re: Dark Matter
Post by: jameslink2 on June 21, 2013, 02:13 am
Dark matter... matter that doesn't reflect light. Most carbon chain compounds absorb many frequencies of visible light, including IR and going all the way into UV. There are tons of interesting organics in space to do this, although I think most of them are simple alcohols... some nitrogen compounds, too.

It is also used to fill the intellectual gap which has not yet been filled by theory and observation: the Universe seems to behave as though it is more dense than we can see. Hence, dark matter... It is a filler theory... until we get our next big discovery in the Universe....

I dont think that is a good description of dark matter, it does not reflect or emit light or any energy in the electromagnetic spectrum.

It is more of a mathematical construct that is used because the current theories  do not explain a lot of what is seen in the universe. For example 29% of all matter seems to be missing and the gravity produced by the super massive black hole should not be holding the galaxy together the way it is.

Me personally, I am sure we are wrong about a lot of things in the universe. From the earth we can see out 46 Billion light years in every direction. That is the size of the visible universe. We know we are not at the center of the universe so we can infer that the universe is larger than we can see.

We also believe that the universe is 13.8 Billion years old. A little simple math and the universe is expanding at 3 times the speed of light but that only gets us to the size of the visible universe from the big bang. BTW, the universe can move/expand faster than the speed of light due to the expansion of space-time not being the movement of a single particle.

To make a long story shorter, dark matter could be our underestimation of the size of the universe and our lack of understanding of the effects galactic objects have on the curvature of space time.



Title: Re: Dark Matter
Post by: PerPETualMOtion on June 22, 2013, 03:39 am
Antimatter creates the mirror image of matter. When we develop antimatter antennas, we will see that the space between galaxies is actually replete with antimatter.
Title: Re: Dark Matter
Post by: SelfSovereignty on June 22, 2013, 03:54 am
Antimatter creates the mirror image of matter. When we develop antimatter antennas, we will see that the space between galaxies is actually replete with antimatter.

We have developed antimatter.  We use it every day.  PET scans, for example: Positron Emission Tomography.  Positrons are positively charged electrons, i.e. antimatter.  In a nuclear weapon you take an atom and you split it, and the two halves you end up with have less mass than their sum did.  That difference of mass becomes pure energy and is released as heat, light, a blast wave, etc..

That's what E=MC^2 refers to.  The energy contained in a given object is equal to the mass of the object times the speed of light squared; E is the absolute maximum amount of energy you'll get if you convert the entire mass to pure energy.  When matter and antimatter collide, they annihilate each other and both masses become pure energy.  So given that, I'm not sure what makes you think the space between galaxies is full of antimatter...
Title: Re: Dark Matter
Post by: PerPETualMOtion on June 22, 2013, 02:58 pm
Antimatter creates the mirror image of matter. When we develop antimatter antennas, we will see that the space between galaxies is actually replete with antimatter.

We have developed antimatter.  We use it every day.  PET scans, for example: Positron Emission Tomography.  Positrons are positively charged electrons, i.e. antimatter.  In a nuclear weapon you take an atom and you split it, and the two halves you end up with have less mass than their sum did.  That difference of mass becomes pure energy and is released as heat, light, a blast wave, etc..

That's what E=MC^2 refers to.  The energy contained in a given object is equal to the mass of the object times the speed of light squared; E is the absolute maximum amount of energy you'll get if you convert the entire mass to pure energy.  When matter and antimatter collide, they annihilate each other and both masses become pure energy.  So given that, I'm not sure what makes you think the space between galaxies is full of antimatter...

Right, positrons, the opposite of electrons, first predicted by Paul Adrien Maurice Dirac in the 1920s--or thereabouts. Don't stand with such certainty that the equation is absolute and complete. It fits our current understanding, but like Newton's deterministic universe, quantum probability threw a monkey wrench into everything.

Yes, we produce antimatter, and in moments it is destroyed. That does not defeat the proposal of an electromagnetic spectrum that exists in more than one dimension--the range of frequencies that matter produces.
Title: Re: Dark Matter
Post by: SealTeam6 on June 22, 2013, 05:20 pm
Antimatter creates the mirror image of matter. When we develop antimatter antennas, we will see that the space between galaxies is actually replete with antimatter.

We have developed antimatter.  We use it every day.  PET scans, for example: Positron Emission Tomography.  Positrons are positively charged electrons, i.e. antimatter.  In a nuclear weapon you take an atom and you split it, and the two halves you end up with have less mass than their sum did.  That difference of mass becomes pure energy and is released as heat, light, a blast wave, etc..

That's what E=MC^2 refers to.  The energy contained in a given object is equal to the mass of the object times the speed of light squared; E is the absolute maximum amount of energy you'll get if you convert the entire mass to pure energy.  When matter and antimatter collide, they annihilate each other and both masses become pure energy.  So given that, I'm not sure what makes you think the space between galaxies is full of antimatter...

+1
Title: Re: Dark Matter
Post by: SOUTHPAW on June 23, 2013, 05:26 am
I am stuck in dark matter!  :(
Title: Re: Dark Matter
Post by: goblin on June 23, 2013, 12:43 pm
Dark matter is not all that hotsy-totsy, what really winds the universe's clock is dark energy! It composes 74% of the universe in mass equivalent (e=mc2 [how do you write squared?]), compared to 22% for dark matter and 4% for ordinary matter.

goblin
Title: Re: Dark Matter
Post by: goblin on June 23, 2013, 12:47 pm
Not only that, but dark energy is what is propelling the universe into an accelerated expansion, as a kind of repellent (anti-gravitational?) energy, a la Einstein's gravitational constant, what Einstein called his "biggest blunder", now almost certainly a vindication for the old master.

goblin