We've already learned a lot about the solar system, but sometimes the most fascinating things are what we DON'T know.

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Sources:
https://eos.org/articles/what-caused-the-sudden-heating-of-uranuss-atmosphere
http://www.windows2universe.org/uranus/interior/U_evolution_contraction.html
http://www.windows2universe.org/uranus/interior/U_int_motions_2.html
http://astronomy.nmsu.edu/tharriso/ast105/UranusandNeptune.html
http://www.universetoday.com/32522/oort-cloud/
http://physics.stackexchange.com/questions/26132/what-are-the-facts-that-allow-accepting-the-oort-cloud-theory
https://www.spaceanswers.com/deep-space/whats-so-odd-about-pandoras-cluster/
http://www.universetoday.com/22577/venus-greenhouse-effect/
http://www.nasa.gov/feature/goddard/2016/understanding-the-magnetic-sun
http://www.space.com/22393-sun-magnetic-field-explained-infographic.html
http://www.csmonitor.com/Science/2016/0203/Why-the-sun-s-magnetic-field-is-still-a-mystery
http://www.realclearscience.com/lists/unsolved_problems_in_astronomy/kuiper_cliff.html
http://www.nature.com/news/2011/110907/full/477145a.html
http://gizmodo.com/the-suns-magnetic-field-is-a-beautifully-complicated-ri-1756069517
http://phys.org/news/2016-07-astronomers-gain-insight-magnetic-field.html
http://phys.org/news/2015-03-giant-methane-storms-uranus.html
http://www.universetoday.com/19234/core-of-uranus/

Images/Video:
https://www.youtube.com/watch?v=bgxSVk-zIlA
http://www.nasa.gov/mission_pages/chandra/illustration-of-magnetic-field-of-sun-and-its-kin.html
https://commons.wikimedia.org/wiki/Sun#/media/File:Celestia_sun.jpg
http://scied.ucar.edu/magnetic-field-lines-tangle-sun-rotates
https://sohowww.nascom.nasa.gov/data/summary/copyright.html
https://commons.wikimedia.org/w/index.php?curid=36181378
https://commons.wikimedia.org/wiki/Category:Kuiper_belt#/media/File:14-281-KuiperBeltObject-ArtistsConcept-20141015.jpg
https://commons.wikimedia.org/wiki/File%3AF_oort_cloud.jpg