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Why is the Night Sky Dark?

If the universe is so vast and full of stars, why is the night sky dark?

Hosted by: Caitlin Hofmeister

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Sources:
http://math.ucr.edu/home/baez/physics/Relativity/GR/olbers.html
http://xroads.virginia.edu/~hyper/poe/eureka.html
http://www.cv.nrao.edu/course/astr534/Brightness.html
http://astronomy.nmsu.edu/nicole/teaching/ASTR505/lectures/lecture29/olbers.pdf
https://www.scientificamerican.com/article/why-is-the-night-sky-dark/

Image Sources:
https://www.flickr.com/photos/136304130@N02/27020263483/in/photolist-HaFUXM-7grjer-f8jQ1a-HzjJg6-s3yApg-oekg22-hi3K5u-p4RpEy-p266Ka-zj34MG-pHhj4E-fdhZvs-JZUdht-pRdZ66-f9B4LT-8Uzer6-dFpVEw-hqM5UH-pdnKTP-oLN1QW-c6JdD7-Eyyec-oNa2To-s56TCV-pnSbae-p8UoDx-otS1oZ-ePAu6s-nArAgU-J5Bevc-fG3sRC-hAZHvK-J2xdfo-riA7XD-r9csMz-dhjTH2-pK8Ld4-hSzzfZ-ftpT64-8xFnx2-c7dLN1-dRuU61-jwhn5e-7KC96q-71TU46-ov4Ubm-s1XYCR-dRpnhD-ggB1Ua-nTqMiz
https://commons.wikimedia.org/wiki/File:Heinrich_Wilhelm_Matthias_Olbers.jpg
https://commons.wikimedia.org/wiki/File:Observable_universe_logarithmic_illustration.png
https://commons.wikimedia.org/wiki/File:Crab_Nebula.jpg
https://commons.wikimedia.org/wiki/File:Elliptical_galaxy_IC_2006.jpg
https://en.wikipedia.org/wiki/Recombination_(cosmology)#/media/File:Ilc_9yr_moll4096.png

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