| | Astronomy - the study of objects and matter outside the earth's atmosphere and of their physical and chemical properties.
Merriam - Webster Dictonary Online at http://www.merriam-webster.com/ | |
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| | The tools of astronomy are made to focus different types of electromagnetic radiation so people can interpret the information. These tools are called telescopes and can focus radio waves, x-rays, and of course visible light.
Check out http://hubblesite.org/explore_astronomy/piercing_the_sky/ to learn more about telescopes. | |
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| | The Milky Way Galaxy is one of billions of galaxies in our universe. A galaxy is a cluster of billions of stars held together by gravity.
Galaxies come in many shapes and sizes. Check out http://hubblesite.org/gallery/album/galaxy_collection/ to view pictures of different types of galaxies. | |
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