Astronomers discover 90 per cent more universe

[Woozie]

Max, where do you find all these pics? You had posted one in the LHC thread that I was going to change my desktop to, but I forgot to do it and now I have to dig through the thread to figure out which it was.

[Mizango]

I just don't find this interesting anymore. Seems like they keep talking about the same shit, if they find some aliens let me know.

Casuals. It always seems like the same shit when you have no clue what you're looking at, but thanks for clicking this thread and sharing your carefully thought out, insightful understanding of the cosmos with the group.

[Deftscythe]

The number of missed galaxies is substantial.

Understatement of the decade here.

[Chicomagiko]

No Miz, you are the COSMOS.

and then Miz turned into DARK MATTER.

[Doombard]

Ah so dark matter deals directly wit shit acting more massive than we observe it to be. I see, thanks for the information. Still interesting to know there is so much out there. If only light wasn't so slow.

quoted for thugness.

[Max™]

Max, where do you find all these pics? You had posted one in the LHC thread that I was going to change my desktop to, but I forgot to do it and now I have to dig through the thread to figure out which it was.

Google Fu.


I'd toss in the usual wikipedia joke here, but those usually show in the filename, so it doesn't fit.


As for dark matter in the solar system, who says there is none here?

[Kaylia]

As for dark matter in the solar system, who says there is none here?

Why aren't we able to observe it's impact on far away planet/object, that's what I'm asking.

[Max™]

Oh, not significant enough amounts, though it could help explain some issues such as the solar neutrino count, and the voyager anomaly.

Current models suggest a dark matter particle should weigh little more than a hydrogen atom. It could be hard to pick up the difference that an extra "cloud", weighing as much as a thin hydrogen gas, would make on these scales. It's only when you fill in all the "empty" parts of a galaxy that you get significant enough masses to be really obvious.

The supernova which kerplooey'D the shit the solar system formed from may have generated enough of a gravitational disturbance to blow a bubble in the galactic dark matter cloud, perhaps?

[Zilong]

It's also required to explain this shit:

Spoiler: show

http://vintageprintable.com/wordpres...ark-matter.jpg

Tengen Toppa Gurren Lagann vs Grand Zamboa's final battlefield?

[Max™]

http://randomc.animeblogger.net/imag...Large%2005.jpg

[Tomk]

I'm just a construction worker so please forgive my ignorance. With Woozie's definition of dark mater and others sources that I have read why isn't dark matter simply assumed to be planets, moons, meteors, and comets?

Given that one guy's razor thingy, that would be the simplest assumption. I know that there has to be a logical answer, just curious.

I guess that if 90% of the mass of the universe is in the form of solid rock that might age the universe a little more than we now believe.

[Norellicus]

I'm just a construction worker so please forgive my ignorance. With Woozie's definition of dark mater and others sources that I have read why isn't dark matter simply assumed to be planets, moons, meteors, and comets?

Given that one guy's razor thingy, that would be the simplest assumption. I know that there has to be a logical answer, just curious.

I guess that if 90% of the mass of the universe is in the form of solid rock that might age the universe a little more than we now believe.

I can't answer your question but you get just for giving me a laugh... "that guy's razor thingy" lol

[Mizango]

I'm not sure what you're asking specifically, are you wondering is dark matter is a solid or are you asking how science knows DM isn't a tangible object like a planet? That is a loaded question that could literally turn into a 5 page explanation lol.

Is there anyway you could re-word it possibly? Not trying to be difficult or anything but to me its is like posing the question; "How do we know noble gases like Neon and Krypton are not the equivalent to a double bacon cheese burger with extra Mayo?". If you could reword it, that would be great, I don't mind answering any question(s) you may have

[Eliseos]

"How do we know noble gases like Neon and Krypton are not the equivalent to a double bacon cheese burger with extra Mayo?".

It's because of the mayo, isn't it?

[Acturus]

I'm not sure what you're asking specifically, are you wondering is dark matter is a solid or are you asking how science knows DM isn't a tangible object like a planet? That is a loaded question that could literally turn into a 5 page explanation lol.

Is there anyway you could re-word it possibly? Not trying to be difficult or anything but to me its is like posing the question; "How do we know noble gases like Neon and Krypton are not the equivalent to a double bacon cheese burger with extra Mayo?". If you could reword it, that would be great, I don't mind answering any question(s) you may have

I believe his question is whether or not we know if what we call "Dark Matter" actually contains other known heavenly bodies like comets, planets, etc.

And without having an Astronomer's background myself, I thought that "dark matter" was more or less defined as "stuff other than" these known bodies.

[Kaylia]

I'm just a construction worker so please forgive my ignorance. With Woozie's definition of dark mater and others sources that I have read why isn't dark matter simply assumed to be planets, moons, meteors, and comets?

Given that one guy's razor thingy, that would be the simplest assumption. I know that there has to be a logical answer, just curious.

I guess that if 90% of the mass of the universe is in the form of solid rock that might age the universe a little more than we now believe.

Heavy atoms are pretty rare compared to hydrogen. As an example, the sun account for something like 99.86% of the total mass of the solar system

Because we know most matter is found inside giant hydrogen cloud, stars and blackholes, we have to assume the missing mass is from something else.

[Tomk]

I'm not sure what you're asking specifically, are you wondering is dark matter is a solid or are you asking how science knows DM isn't a tangible object like a planet? That is a loaded question that could literally turn into a 5 page explanation lol.

Is there anyway you could re-word it possibly? Not trying to be difficult or anything but to me its is like posing the question; "How do we know noble gases like Neon and Krypton are not the equivalent to a double bacon cheese burger with extra Mayo?". If you could reword it, that would be great, I don't mind answering any question(s) you may have

How science knows it isn't a planet. (or planets actually)

Heavy atoms are pretty rare compared to hydrogen. As an example, the sun account for something like 99.86% of the total mass of the solar system

Because we know most matter is found inside giant hydrogen cloud, stars and blackholes, we have to assume the missing mass is from something else.

This helps, thanks.

[Max™]

There's also something known as absorption spectra, the way you can tell which gas is floating around that star way the fuck over there *points* is by seeing which frequencies of light didn't make it to you.

Various spectra correspond to various elements, hydrogen, neon, oxygen, etc.

The presence of significant amounts of WDM (warm dark matter, planets, gas, rocks) would affect the types of, and manner in which, radiation arrived here in our telescopes.

The presence of enough matter to account for the observed effects would also cause it to heat up, which is the main "tell" in this situation actually.

http://news.nationalgeographic.com/n...rk-matter.html

But now, by observing a massive collision between two large clusters of galaxies, astronomers have detected what they say could only be the signature of dark matter.
The scientists used optical and x-ray telescopes to measure the location of mass in the collided formation, known as the "bullet cluster" because of its shape.
More than 90 percent of the visible mass in a galaxy cluster is hot gas. The rest is stars located within individual galaxies.
The composite image at left shows that this hot gas (red) was dragged away from the stars and galaxies (blue) during the collision (see bigger photo).
But most of the mass—and thus matter—is located within the galaxies, or the blue areas, scientists say.
In other words, the bulk of visible matter in the clusters has been separated from the majority of mass—which therefore must be dark matter. "This proves in a simple and direct way that dark matter exists," Maxim Markevitch of the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts, said in a telephone briefing Monday with reporters.

http://chandra.harvard.edu/photo/200...tt_anim_lg.mpg

http://chandra.harvard.edu/photo/200.../bullet_lg.mpg

http://chandra.harvard.edu/photo/200..._matter_lg.mpg

http://chandra.harvard.edu/photo/200...ill_4panel.jpg

http://www.youtube.com/watch?v=nJN2X3NrQAE
Neil Degrasse Tyson, for Mizzle, for shizzle.

http://www.youtube.com/watch?v=2DoPAeU3a6Y
Nice ass animation which covers the MPEG's up there (which I'll leave in case anyone wants em) very well.

[Woozie]

Dark matter is a whooping 90% of our galaxy. If 90% of our galaxy was rocks/meteors/comets/planets/etc, it would be incredibly easy to detect. Whatever dark matter is, it must be something that doesn't interact with electromagnetic radiation at all. It must be completely invisible to all forms of light. There is no way any normal forms of matter can account for the 90% invisible mass of galaxies.

[Thuronn]

How does one discover something that's always been there?

Should be retitled Astronomers discover new technology to actually see 90% of the universe.

OH HAI GUYZ LOOK I FHOUND TEH UNIVERSE.