The Missing Matter Problem

By Emily and Megan

What is dark matter?

By By

Why, that was dark matter!

AHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAH

Back on subject...

Although technically the last 20 slides or so were on subject. True that, but now we're getting off subject.POINT IS!!! Um, what is the point?Wow, we've wasted a whole slide.And not only that, but on said slide is a bunch of boring nonsense about staying on subject.And now we've gotten off subject yet again.Hey, this is kind of fun!Oh no, Emily's coming now to ruin our fun!RUN AWAAAAAAAAY!

Now Emily Ruins it and is all serious...

Massive astrophysical compact halo objectsThis is one theory that explains a lot of ideas about the composition of our universe. This idea says that dark matter is not in fact invisible but is just black matter that we cannot see against the night sky.

Subatomic Particles This concept states that dark matter is completely normal visible particles. Completely normal except 1 sixth hundredth the size of a ELECTRON. They don't really clump together because they don't have much gravity.

SCARY THEORY THREE!

Dark matter is normal matter that reflects X rays instead of normal light so we can't see it. I don't get it either. It has something to do with REALLY hot gas.

The Discovery of Dark matter

Dark matter was discovered by Fritz Zwicky. He was doing a project where he was measuring the mass of a galaxy. He measured it by finding out how much light there was. He could then mathematically calculate the mass. Then he tried again a different way to confirm his findings.

More on the Discovery

He used the Rotational Velocity, a method that uses the droplar shift*. Not only did he find over 400 times more mass than before, but he found that the stars on the end were rotating at a speed so fast that the galaxy should be ripped apart. The only way that the stars could be rotating that fast would be if there was other mass there to support it. People ignored his findings until the nineteen seventies when it became directly relevant to lots of holes they were finding in resaerch. It explained many theories and problems.

Ahahahaha Megan has taken back control of the computer!TOUGH NUGGETS EMILY!Now, what shall we talk about?How about birdfeeders?Um, I don't really know much about birdfeeders. They're cool, I guess.AHHHH Emily's returning! Look out, there is probably a lot of boring info about dark matter coming up, so put on your 3D glasses and beanie hat (and don't forget your protecting fishing pole) and b

Some bits of research that I think are funny. FACT: 90-99% of all mater we cannot see. And a funny quote to go with it: "It's a fairly embarrassing situation to admit that we can't find 90 percent of the universe"- Bruce H. Margon (UW chairman astronomy department) FICTION: the way that the Golden Compass refers to it. Fail. SPECULATION: You will NOW forever have to live knowing that a mass astrophysical compact halo object could could be hovering above earth. Our doom is pending. Think about it... 90-99%....

The Droplar Shift

The droplar shift was discovered by Christian Droplar. He was the one that figured out that light has shifts associated with colors. When light is moving toward you, it is in a blue shift. When it is going away it is in a red shift. We can therefor tell how fast galaxies are going and which ways they are going. Using the rotational velocity we can tell how fats they rotate. The side moving toward us is blue and the side moving away from us is red. Once we know how fast it is rotating we can calculete how much matter is in it.

Bibliography

we will send this to Shaye and not bore you with it.