There are billions of galaxies and we have discoved many of them. We use the Hubble Space Telescopes to find them. Some of the clearest views we have found are in the Hubble Deep Field(HDF). There is one southward and another northward.
The Hubble Deep Field north is one of the deepest, sharpest, multi-colored images in the universe. They found this by pointing the Hubble Space Telescope towards an emty spot in the sky, by the big dipper, for 10 days. it was found in 1995. They found thousands of new galaxies when it was discovered.
When they turned the telescope south they found another stunning sight. They pointed it toward the south constellation Tucana. Again they looked for 10 days, but this time it was in 1998.
There are 3 main galaxy types. They are ellipticals, spirals, and irregulars. Ellipticals are round or ocal shaped and are the most common galaxies found nearby. Spirals have pinwheel-shaped arms. The irregular galaxies are the ones that dont fit in the other galaxy catagories. They are the least common galaxies nearby.
Wednesday, March 18, 2009
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