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“Originality is the fine art of remembering what you hear but forgetting where you heard it.” -Laurence J. Peter This past week was a super busy one on Starts With A Bang, from dark energy to stars to a fabulous book review and more! Just in the last seven days, we’ve looked at:
Image credit: The Cosmic Perspective / Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider and Mark Voit. From Azri -- our original question-asker -- on the topic of how long the Universe has been accelerating: "Just when you mentioned that the universe was almost 7.8 billion years old when started accelerating: I think that calculation is based on a "constant” cosmological constant! what if Dark energy was dynamical !? can one expect more than 8 bill years, lets say almost recently!" If dark energy changes over time -- which it may -- then it's conceivable that the Universe began a...