The Universe
According to the Big Bang Theory the Universe is made by a huge explosion that
created different kind of matter. These matters scattered and formed
galaxies. The Big Bang also state's that the universe is expanding and will
eventually end.
created different kind of matter. These matters scattered and formed
galaxies. The Big Bang also state's that the universe is expanding and will
eventually end.
Galaxies
There is only one Universe however there are billions of galaxies. There are three types of galaxies irregular, elliptical and spiral. The Earth that we live on is in the Milky Way. Milky Way is a Spiral type of Galaxy. A spiral galaxy has a string like shape coming from the middle, like a pinwheel.
Bibliography
Erickson,K 2012, Solar System Exploration, viewed September 5 2012, NASA
http://solarsystem.nasa.gov/planets/index.cfm
http://solarsystem.nasa.gov/planets/index.cfm