Question: what are two of the most important events in space exploration?
Answer: 4 October 1957 - The world's first artificial satellite. ...  12 April 1961 - The first man in space. ...  16 June 1963 - The first woman in space. ...  18 March 1965 - First-ever spacewalk. ...  20 July 1969 - First man on the Moon. ...  7 February 1984 - 'Free-flying' in space. ...  20 November 1998 - Assembly of ISS begins.