<sod>''[[Voyager 1]]'' was unable to visit Uranus because investigation of [[Saturn]]'s moon [[Titan (moon)|Titan]] was considered vital. This trajectory took ''Voyager&nbsp;1'' out the plane of the [[ecliptic]], ending its planetary science mission.<ref name="Swift1997">{{cite book|author=David W. Swift|title=Voyager Tales: Personal Views of the Grand Tour|url=https://books.google.com/books?id=E-NGFqfq1LsC&pg=PA69|date=1 January 1997|publisher=AIAA|isbn=978-1-56347-252-7|page=69}}</ref>{{rp|118}}<eod>
<sod>''[[Voyager 1]]'' was unable to visit Uranus because investigation of [[Saturn]]'s moon [[Titan (moon)|Titan]] was considered vital and more of a priority. This trajectory took ''Voyager&nbsp;1'' out the plane of the [[ecliptic]], ending its planetary science mission.<ref name="Swift1997">{{cite book|author=David W. Swift|title=Voyager Tales: Personal Views of the Grand Tour|url=https://books.google.com/books?id=E-NGFqfq1LsC&pg=PA69|date=1 January 1997|publisher=AIAA|isbn=978-1-56347-252-7|page=69}}</ref>{{rp|118}}<eod>