Giving Jack Karma just for the attempt.
The beginning looks terrible and the dialogue is so badly acted that your sure your in for a boring film, but if you give it time and allow the story to unfold a bit then you will get more out of it. Believe it or not the acting actually gets better towards the end, but not enough to call it acting.
To wrap it up: The goverment sends these astronauts up into space with three women before the doomday machine goes off. While up in space the whole planet has a nuclear reaction and explodes. There is some scabbling over the women and a grusome scene of one male and felmale getting stuck in the vacum chamber and sucked into space leaving only the more rational members of the crew. They calculate that they can only carry 3 people to make it to Venus, so two of them do the right thing when they need to seperate part of the ship in order to use the rocket. They sacrifice themselves willingly to so the others can continue. There is a surprise at the end with the alien "collective voice" spacecraft.
This was made in 1969 and never finished, but someone (I read at imdb.com) found the film and added some scenes in 1972 to finish the picture. The film was made around the time of 2001 SPACE ODYSSEY and MAROONED and the film contains some of the elements of these two films, only the story is a little bit different especially with the earth exploding and the women on board.
There really isn't any nudity in this film. The image in the post is the closest thing to it.