https://en.wikipedia.org/wiki/1815_eruption_of_Mount_Tambora
https://en.wikipedia.org/wiki/Year_Without_a_Summer
https://www.usatoday.com/story/weather/2016/05/26/year-without-a-summer-1816-mount-tambora/84855694/
https://scienceblogs.com/startswithabang/2010/07/12/q-a-how-long-would-we-have-if
https://medium.com/@chrisnelsonMET/1816-the-year-we-had-no-summer-5f32ffdc72e8
https://www.sciencefocus.com/space/what-would-happen-to-earths-orbit-if-the-sun-vanished/
https://www.livescience.com/45979-why-does-the-moon-shine.html
https://www.businessinsider.com/what-would-happen-if-the-sun-disappeared-2015-8
https://www.space.com/22471-red-giant-stars.html
http://www.geologyin.com/2014/12/geothermal-gradient.html
https://www.washingtoncitypaper.com/columns/straight-dope/article/20782861/if-the-sun-went-out-how-long-before-wed-freeze
https://en.wikipedia.org/wiki/Speed_of_light
https://en.wikipedia.org/wiki/Autotroph
https://www.popsci.com/what-would-happen-if-moon-suddenly-disappeared/
https://earthsky.org/space/what-would-happen-if-sun-disappeared-infographic
http://curious.astro.cornell.edu/our-solar-system/39-our-solar-system/the-earth/other-catastrophes/61-how-long-could-life-on-earth-survive-if-the-sun-stopped-shining-beginner
https://www.popsci.com/node/204957/
https://www.popsci.com/science/article/2013-07/if-sun-went-out-how-long-could-life-earth-survive/