Journey of the New Horizons space probe through the Solar System and beyond.<sup id="cite_ref-SD-20181227_1-0" class="reference"><a href="#cite_note-SD-20181227-1">[1]</a></sup><p><a rel="nofollow" class="external free" href="https://www.sciencedaily.com/releases/2018/12/181227152745.htm">https://www.sciencedaily.com/releases/2018/12/181227152745.htm</a>
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The Kuiper Belt lies in the so-called "third zone" of our solar system, beyond the terrestrial planets (inner zone) and gas giants (middle zone). This vast region contains billions of objects, including comets, dwarf planets like Pluto and "planetesimals" like Ultima Thule. The objects in this region are believed to be frozen in time -- relics left over from the formation of the solar system. <style data-mw-deduplicate="TemplateStyles:r734161018">.mw-parser-output .reflist-talk{margin:auto 2em;border:1px dashed #AAAAAA;padding:4px;background-color:white;padding-left:1em}.mw-parser-output .reflist-talk-title{font-weight:bold}</style><div class="reflist-talk">
<p class="reflist-talk-title">References</p>
<div class="reflist" style="list-style-type: decimal;">
<ol class="references"><li id="cite_note-SD-20181227-1"><span class="mw-cite-backlink"><a href="#cite_ref-SD-20181227_1-0">↑</a></span> <span class="reference-text"><a href="https://en.wikipedia.org/wiki/Applied_Physics_Laboratory" class="extiw" title="w:Applied Physics Laboratory">The Johns Hopkins Applied Physics Laboratory</a> (<span class="mw-formatted-date" title="2018-12-27">27 December 2018</span>). <a rel="nofollow" class="external text" href="https://www.sciencedaily.com/releases/2018/12/181227152745.htm">All about Ultima: New Horizons flyby target is unlike anything explored in space</a>. <i><a href="https://en.wikipedia.org/wiki/Science_Daily" class="extiw" title="w:Science Daily">Science Daily</a></i>. Retrieved on <span class="mw-formatted-date" title="2019-01-05">5 January 2019</span>.</span>
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NASA/JHUAPL/SwRI
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