A round..... swirly.... thing?
It is a large, central ball, with a round ring circling it, usually with distinct arms. Do Google image search. They are hard to do just with words.
Their shape is an elipse
An eliptical refers to a galaxy. Their shapes are different depending on their size. They can be circular, spherical, long, cigar shaped, fat, skinny and narrow. Elipticals can also have a large array of sizes.
it will look like something untidy
Much like it does now.
It means the galaxy has the shape of a spiral. To see what this looks like, search Google Images (image.google.com) for examples.
A spiral, I think.
An irregular galaxy looks sort of like clouds in the sky. A large part of an irregular galaxy is made of clouds of dust and fine rock. The Milky Way galaxy looks like a pinwheel, and some galaxies look like near-perfect discs.
Our Galaxy, the Milky Way Galaxy. you may see others that look like stars but are actually galaxy's (M52).
ursa major would look like an ocean
Well, they look like a big belt of asteroids circling around planets or galaxy.
You can find a Weslo Eliptical trainer online at the following sites take a look at them www.sears.ca/Elliptical-Trainers , and at this site www.walmart.com/ip/Weslo-Momentum-G3.8-Elliptical/10568385
It does not look like a spiral because we are inside the disk that forms the spiral arms. To see the spiral, you have to be outside the galaxy, viewing the disk from above or below.