Monday, December 10, 2012

Types of Galaxies

Dear viewers,

Here is a link to my note catcher for this assignment.

      I have learn a lot of things from this unit about galaxies. I especially like the brain pop video about Galaxies and about the milky way and discovery education activity. I learned that galaxies are huge group of stars and there are about 100 billion galaxies in the universe. I learned that the Milky Way Galaxy was a spiral galaxy. And there are three different galaxies. A Irregular Galaxy which has a undefined shape and are mostly made up of lots of gas and dust and little stars. And a Irregular Galaxy is a Galaxy that can not be a Spiral or Elliptical Galaxy. If the Earth were in A Elliptical Galaxy I would be bright day and night non- stop. There are also Spiral Galaxies which are shaped like disk they have some dust and gas but not a lot, and they have middle aged stars. The final galaxy that I learned about is A Elliptical Galaxy, which is shaped like a sphere or a circle they have a little gas and dust (not much), they contain old stars. I also learned that galaxies can contain 10 million to 30 trillion stars. It takes about 200 billion light years for our sun to rotate around the center of the Milky Way Galaxy once. The oldest stars in the Milky Way galaxy are located in the center. I would take about 100,100 light years to travel from one side of the Milky Way to the other side. The arms of Spiral Galaxies are where the stars are forming. There are four major arms in the Milky Way Galaxy. The Solar system is located on the Orion arm. From the Earth The Milky Way is a hazy color. Astronomers believe that there is a black hole in the center of the Milky Way Galaxy. The speed of light is 186,000 miles per hour.

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