Is our galaxy composed of both Matter and Anti-Matter?

I'm not sure what to make of this website. Is it true or junk science?

Quote :

The Milky Way Galaxy is a spiral galaxies with galactic bulge in the center, a large circular disk where our solar system resides, and an encompassing halo.

* The Bulge is a flattened spheroid, 3,000 light years high and 20,000 light years in diameter. In the center of the budge are two black holes. One is composed of condensed matter and the other is composed of condensed antimatter. The black holes have the mass of a billions of suns but maybe smaller than the sun. The Einstein-Rosen Bridge keeps the matter and antimatter black holes separated. The oscillations between the black holes at opposite ends of the wormhole force the black holes to become white holes that eject matter and antimatter in opposite directions forming the spiral arms of stars within the galactic disk. Scientists have observed hundreds of new stars are being churned out from the center of the galaxy.
* The Disk has spiral arms, is 10,000 light years thick and 100,000 light years in diameter. One spiral arm is composed of matter and the other is antimatter. Each spiral arm contains billions of stars, planets, galactic dust and gas. There are a similar number of matter and antimatter stars. The sun is composed of matter and is located 28,000 light years from the center of the galaxy. When galactic antimatter enters our solar system, the antimatter is called comets.
* The Halo is a diffuse spherical region that surrounds the Bulge and Disk. Our galaxy has about 200 globular clusters containing between ten thousand to a million stars. The halo extends tens of thousands of light years beyond the edge of the disk.

The Whirlpool Galaxy is one of the most photogenic galaxies which shows the galactic budge and disk. The Space Telescope Science Institute, who is responsible for operating the Hubble Space Telescope as an international observatory, has a wealth of information and pictures of the Milky Way Galaxy and other galaxies in the universe.

http://www.matter-antimatter.com/milky_way_galaxy.htm

I've never heard it said that comets are composed of antimatter, so my guess is, this is not scientifically accurate.