The <a href="https://en.wikipedia.org/wiki/Soviet_Union" id="mwAaA" rel="mw:WikiLink" title="Soviet Union">Soviet</a> <a href="https://en.wikipedia.org/wiki/Vega_1" id="mwAaE" rel="mw:WikiLink" title="Vega 1">Vega 1</a> begins returning images of <a href="https://en.wikipedia.org/wiki/Halley's_Comet" id="mwAaI" rel="mw:WikiLink" title="Halley's Comet">Halley's Comet</a> and the first images of its nucleus.