<a href="https://en.wikipedia.org/wiki/Pioneer_program" id="mw3A" rel="mw:WikiLink" title="Pioneer program">Pioneer program</a>: <a href="https://en.wikipedia.org/wiki/Pioneer_10" id="mw3Q" rel="mw:WikiLink" title="Pioneer 10">Pioneer 10</a> sends back the first close-up images of <a href="https://en.wikipedia.org/wiki/Jupiter" id="mw3g" rel="mw:WikiLink" title="Jupiter">Jupiter</a>.