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This book continues our exploration of cosmology, the science of the universe as a whole.

One of the most profound questions in cosmology is: Has our universe existed forever, or did it have a beginning? Philosophers, theologians, and scientists have argued both sides of this debate, for millennia. The first observational evidence came in 1929 when American astronomer Edwin Hubble announced his discovery that the universe was expanding, and therefore had a beginning. This was one of the most important discoveries of the 20th century.

This eBook examines the key steps leading to Hubble’s discovery, including the contributions of Henrietta Leavitt and the understanding of supernovae and redshifts, color changes of starlight that reveal motion. We explain what “expansion” means, what is expanding and what isn’t. We then explore the accelerating expansion of our universe and dark energy.

ASIN ‏ : ‎ B00CWFLMLM
Publisher ‏ : ‎ Real Science Publishing
Accessibility ‏ : ‎ Learn more
Publication date ‏ : ‎ May 19, 2013
Language ‏ : ‎ English
File size ‏ : ‎ 647 KB
Screen Reader ‏ : ‎ Supported
Enhanced typesetting ‏ : ‎ Enabled
X-Ray ‏ : ‎ Not Enabled
Word Wise ‏ : ‎ Enabled
Print length ‏ : ‎ 44 pages
Page Flip ‏ : ‎ Enabled
Best Sellers Rank: #3,492,878 in Kindle Store (See Top 100 in Kindle Store) #563 in Relativity Physics (Kindle Store) #1,313 in 90-Minute Science & Math Short Reads #1,417 in Relativity Physics (Books)
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