The movie Buck Rogers in the 25th Century was released 1979, marking it the 40th anniversary in time writing this. I starred the hot Erin Gray as Colonel Wilma Deering in a jump suit and a handsome Gil Gerard as Captain Buck Rogers, based on this comic character created in 1928 already.
The intro might suggest this it's a soft porn movie, but it is not. But as close at it gets to be allowed on prude 1970s US TV. I was in my early teens and when Erin Gray was slipping up and down the illuminated letters of BUCK ROGERS... Oh boy. :-)
It's a space soap and rides on the success of this new genre created by Star Wars two years earlier. The movie also spawned a TC series spanning over two seasons the same and following year. After the quality of episodes quickly went down and with it the number of viewers the series was cancelled.
I missed this time just after Star Wars hit the big screen 1977 with all the cheesy space operas movies and TV shows as a result. Another I really liked was the first Battle Star Galactica series from 1978. Space soaps died out around 1982. And He-Man took over. ;-)