<a href="https://en.wikipedia.org/wiki/Pluto" id="mwAVs" rel="mw:WikiLink" title="Pluto">Pluto</a> crosses Neptune's orbit, ending a nearly 20-year period when it was closer to the Sun than the gas giant; Pluto is not expected to interact with Neptune's orbit again until 2231.<sup about="#mwt240" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-46"}}' id="cite_ref-46" rel="dc:references" typeof="mw:Extension/ref"><a href="./February_11#cite_note-46" id="mwAVw" style="counter-reset: mw-Ref 46;"><span class="mw-reflink-text" id="mwAV0">[46]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-46"><cite about="#mwt237" class="citation book cs1" id="CITEREFWeintraub2014">Weintraub, David A. (2014). <a class="external text" href="https://books.google.com/books?id=dW1_AwAAQBAJ&amp;pg=PA250" id="mwCcg" rel="mw:ExtLink nofollow"><i id="mwCck">Is Pluto a Planet?: A Historical Journey through the Solar System</i></a>. Princeton University Press. p.<span id="mwCco" typeof="mw:Entity"> </span>250. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwCcs" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwCcw" typeof="mw:Entity"> </span><a href="./Special:BookSources/978-1-4008-5297-0" id="mwCc0" rel="mw:WikiLink" title="Special:BookSources/978-1-4008-5297-0"><bdi id="mwCc4">978-1-4008-5297-0</bdi></a>.</cite><span about="#mwt237" class="Z3988" id="mwCc8" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Is+Pluto+a+Planet%3F%3A+A+Historical+Journey+through+the+Solar+System&amp;rft.pages=250&amp;rft.pub=Princeton+University+Press&amp;rft.date=2014&amp;rft.isbn=978-1-4008-5297-0&amp;rft.aulast=Weintraub&amp;rft.aufirst=David+A.&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DdW1_AwAAQBAJ%26pg%3DPA250&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AFebruary+11"></span></span>