A huge thanks to all of these people, programs, and websites that helped. They may also serve as a great starting point for your own sci-fi as well!
http://www.rand.org/content/dam/rand/pubs/commercial_books/2007/RAND_CB179-1.pdf -- A very, very old paper on habitable planets specifically for humans, helped us to see what temperatures and pressures humans can withstand.
http://en.spaceengine.org/ -- The source of the beutiful pictures you see posted, an incredible simulator, and exponentially better than Celestia in every way; but mostly graphics. We recommend you check this out.
https://www.youtube.com/channel/UCZFipeZtQM5CKUjx6grh54g - Issac Arthur -- An amazing sci-fi based youtuber who explores many concepts, from transhumanism to the Fermi Paradox.
http://www.orionsarm.com/fm_store/Paul%20Birch's%20Page.htm -- A hub of the late Paul Birch's workings. These papers are essential to many concepts in this world, such as terraforming and orbital rings.
http://www.orionsarm.com/ -- A multi-authored online science fiction world-building project. Helped in many aspects and overall a hard, but good project to look over.