Interesting. Part of me feels like this is Yet Another redesign of Wikipedia. But the optimist in me says that I wish you well in your adventure and hope to see some compettion for sharing unbiased (as much as possible) free knowledge.
One thing large online social communites have struggled with is balancing the decision-making process across a decentralized group of people. Consolidation of power is a concern with any reward or point system. How do you plan to ensure that a single, or few, token holders don’t have a lopsided weight in making decisions that would benefit the few over the many?
One quick favor, the images for the Exoplanet are very pretty but do not seem to be licensed nor scientifically accurate. Could you please indicate a source?
Full disclosure, I work for the Wikiemeida Foundation, the non-profit that supports Wikipedia and its sister projects. However my comments here are made in my personal capacity.