The <a href="https://en.wikipedia.org/wiki/Mariner_2" id="mwARo" rel="mw:WikiLink" title="Mariner 2">Mariner 2</a> unmanned space mission is launched to <a href="https://en.wikipedia.org/wiki/Venus" id="mwARs" rel="mw:WikiLink" title="Venus">Venus</a> by <a href="https://en.wikipedia.org/wiki/NASA" id="mwARw" rel="mw:WikiLink" title="NASA">NASA</a>.