<a class="mw-redirect" href="https://en.wikipedia.org/wiki/Sputnik_program" id="mw2Q" rel="mw:WikiLink" title="Sputnik program">Sputnik program</a>: The <a href="https://en.wikipedia.org/wiki/Soviet_Union" id="mw2g" rel="mw:WikiLink" title="Soviet Union">Soviet Union</a> launches <i id="mw2w"><a href="https://en.wikipedia.org/wiki/Sputnik_2" id="mw3A" rel="mw:WikiLink" title="Sputnik 2">Sputnik 2</a></i>.<sup about="#mwt26" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-3"}}' id="cite_ref-3" rel="dc:references" typeof="mw:Extension/ref"><a href="./November_3#cite_note-3" id="mw3Q" style="counter-reset: mw-Ref 3;"><span class="mw-reflink-text" id="mw3g">[3]</span></a></sup> On board is the first animal to enter <a href="https://en.wikipedia.org/wiki/Orbit" id="mw3w" rel="mw:WikiLink" title="Orbit">orbit</a>, a <a href="https://en.wikipedia.org/wiki/Soviet_space_dogs" id="mw4A" rel="mw:WikiLink" title="Soviet space dogs">dog</a> named <a href="https://en.wikipedia.org/wiki/Laika" id="mw4Q" rel="mw:WikiLink" title="Laika">Laika</a>.<sup about="#mwt30" class="mw-ref reference" data-mw='{"name":"ref","attrs":{"name":"BBC"},"body":{"id":"mw-reference-text-cite_note-BBC-4"}}' id="cite_ref-BBC_4-0" rel="dc:references" typeof="mw:Extension/ref"><a href="./November_3#cite_note-BBC-4" id="mw4g" style="counter-reset: mw-Ref 4;"><span class="mw-reflink-text" id="mw4w">[4]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-3"><cite about="#mwt23" class="citation web cs1" id="mwB-g"><a class="external text" href="https://nssdc.gsfc.nasa.gov/nmc/spacecraft/displayTrajectory.action?id=1957-002A" id="mwB-k" rel="mw:ExtLink nofollow">"Sputnik 2 Launch and Trajectory Information"</a>. <i id="mwB-o">NASA Space Science Data Coordinated Archive</i><span class="reference-accessdate" id="mwB-s">. Retrieved <span class="nowrap" id="mwB-w">November 2,</span> 2019</span>.</cite><span about="#mwt23" class="Z3988" id="mwB-0" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=NASA+Space+Science+Data+Coordinated+Archive&amp;rft.atitle=Sputnik+2+Launch+and+Trajectory+Information&amp;rft_id=https%3A%2F%2Fnssdc.gsfc.nasa.gov%2Fnmc%2Fspacecraft%2FdisplayTrajectory.action%3Fid%3D1957-002A&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ANovember+3"></span></span>