Fashion: Movie star who popularized trenchcoats & berets.?

Questions

In 1974 Philippe ---------- walks tightrope strung between the twin towers of the World Trade Center, New York. ?

In 1976 U.S. ---------- goes into Martian orbit after an 11-month flight from Earth. ?

In 1987 ---------- Cox swims 4.3 km from US to USSR in 4?

In 1987 Lynne ---------- swims 4.3 km from US to USSR in 4?

In 1579 Cornerstone is laid for ---------- Brahe's Uraniborg observatory. ?