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Earth Science

 Categories: Environment, Science  Pages: 352  Language: English  Format: PDF  Tags: Climate ChangeEnvironmental ScienceNatural Disasters |  Download PDF Book  Direct Link
Books | Environment | Earth Science
 Excerpt  :

After discovering that there are galaxies beyond the Milky Way, Edwin Hubble went on to measure the distance to hundreds of other galaxies. His data would eventually show how the universe is changing and would even yield clues as to how the universe formed.

Redshift. If you look at a star through a prism, you will see a spectrum, or a range of colors through the rainbow.

The spectrum will have specific dark bands where elements in the star absorb light of certain wavelengths. By examining the arrangement of these dark absorption lines, astronomers can determine the composition of elements that make up a distant star.

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