Dark Energy, Dark Matter, Darth Vader, Oh My

   Oh noooo. It's challenge time for the first time ever. I must say for my first challenge I was not expecting something so, well challenging. I will be attempting to explain dark energy, dark matter and defining the unidentifiable matter, however I'm going to skip this last part. Now, while this subject is entertaining to some, not everyone will find it fun.  In an attempt to make physics more fun, Star Wars jokes will be inserted in green. Throughout my post these random, green, Star Wars bits, will have nothing to do with the rest of the post. Let's start it off with a joke. Why did the chicken cross the road? Because it couldn't resist the dark side.
   The vast universe that we live in is comprised of around 70% dark energy, 25% dark matter, and 5% normal matter. Although dark energy and matter make up most of the universe not an awful lot is definitely known about them. Much of what is known can be speculated upon, and both are more easily defined by what they aren't than what they are.How do you know you bought a second-rate death star? Every corridor ends in a bottomless pit.
   Einstein, apart from discovering the concept of gravity, also realised that empty space was not necessarily empty. This 'empty space' has the ability to posses it's own energy, or dark energy. Space is constantly expanding and as it does more of this energy comes into being. If Einsteins theory of gravity with a cosmological constant is correct, than Dark energy is a property of space, however the theory of gravity we know today may not be accurate. There are several different options on what dark energy is, but none of them explain why it exists, and exactly what it does. You might be a redneck Jedi if... you knew princess Leia was your sister all along.
   While looking up dark matter I noticed that over half of the description was what it was not. Dark matter is not, antimatter, black holes, or baryonic clouds. Dark matter is either made up of MACHOs (massive compact halo objects) or WIMPs (weakly interacting massive particles). MACHOs are massive objects such as neutron stars, or black holes. Most of these things are created by supernovas. WIMPs are fairly tiny subatomic particles that can pass through matter. At this point scientists are leaning more towards dark matter being made up of WIMPs. What's princess Leia's favourite pick up line? "Nice buns princess. On your head that is."
    For more accurate information please visit http://science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy/. Also all of the Star Wars jokes were acquired at http://www.maniacworld.com/star_wars_jokes/Star_Wars_Jokes.html, although I should warn you most of them are in pretty bad taste. The subject may seem overwhelming, but take your time and read over it a few times, I know it took me a few reads. 

Business

Now only 7 behind, I'm catching up. I am now inviting you to issue me another challenge. I will pick the best one by Friday. Please leave your challenge ideas in the comments. 

Doctor Who Quote

Some things are just too hard to describe properly.

The Doctor: People assume that time is a strict progression of cause to effect... but actually, from a non-linear, non-subjective viewpoint, it's more like a big ball of wibbly-wobbly... timey-wimey... stuff.