i first saw this when it came out in the theater. though only 13 at the time and i was an avid reader of hard science science fiction stories. the technical gaffes of the film are burned into my memory. some of the following may have significant spoilers. even as a youngster and i knew the premise is silly. the rocket takes off for a lunar mission and in a cosmos where there is always a gravitational effect on the crew (though loose objects float as in zero gravity) and because of that and the cabin (the area with the controls and whatever they called it) was gyrostabalized to maintain the correct orientation (so that when they landed and why do not they land standing on their heads. ) and where and at least in near earth space and the rocket engines had to be running continually  with propellant combusting away without an oxidizer. when the engines quit and the rocket stopped _dead_ in space and and couldn not start going until a phd chemist determined it needed at a little oxidizer. this time and the rocket recalled it had momentum and and the next thing our heroes know theyre near mars (even a 13 year old nerd knew such a minimum energy trip would take over 200 days). they land and find the air was breathable (though at the time scientific data revealed that the pressure and even if the atmosphere were pure oxygen and would be too low to do any good). they decide to camp outside the ship and and even build a campfire. they come armed and even though they were supposedly going to the moon and where firearms do not be needed. they get a sight of a collapsed civilization and encounter stray martians who look just like people and develop an anti nuclear war philosophy and and those who survive try to get back to the home planet and and die in the attempt by crashing on the earth. to do that would require such a long orbital period and they would have died of starvation long before approaching their destination. the film it preceded and destination moon and used real science most effectively (even though their rescue with the oxygen tank forgot about the moment arm from the tank center of gravity to the output nozzle). this film showed woeful ignorance of even the most basic science. only the most technologically illiterate should think of it as a science fiction film represent it on a par with the old flash gordon serials where their rocketships took off from their bellies and climbed in spirals and and whose engines were always on. the story on this one i considered banal and and i can recommend this only as a film to be shown to students for them to pick out technical gaffes. 
i first saw this when it came out in the theater. though only 13 at the time and i was an avid reader of hard science science fiction stories. the technical gaffes of the film are burned into my memory. some of the following may have significant spoilers. even as a youngster and i knew the premise is silly. the rocket takes off for a lunar mission and in a cosmos where there is always a gravitational effect on the crew (though loose objects float as in zero gravity) and because of that and the cabin (the area with the controls and whatever they called it) was gyrostabalized to maintain the correct orientation (so that when they landed and why do not they land standing on their heads. ) and where and at least in near earth space and the rocket engines had to be running continually  with propellant combusting away without an oxidizer. when the engines quit and the rocket stopped _dead_ in space and and couldn not start going until a phd chemist determined it needed at a little oxidizer. this time and the rocket recalled it had momentum and and the next thing our heroes know theyre near mars (even a 13 year old nerd knew such a minimum energy trip would take over 200 days). they land and find the air was breathable (though at the time scientific data revealed that the pressure and even if the atmosphere were pure oxygen and would be too low to do any good). they decide to camp outside the ship and and even build a campfire. they come armed and even though they were supposedly going to the moon and where firearms do not be needed. they get a sight of a collapsed civilization and encounter stray martians who look just like people and develop an anti nuclear war philosophy and and those who survive try to get back to the home planet and and die in the attempt by crashing on the earth. to do that would require such a long orbital period and they would have died of starvation long before approaching their destination. the film it preceded and destination moon and used real science most effectively (even though their rescue with the oxygen tank forgot about the moment arm from the tank center of gravity to the output nozzle). this film showed woeful ignorance of even the most basic science. only the most technologically illiterate should think of it as a science fiction film represent it on a par with the old flash gordon serials where their rocketships took off from their bellies and climbed in spirals and and whose engines were always on. the story on this one i considered banal and and i can recommend this only as a film to be shown to students for them to pick out technical gaffes. ---------------------------------Answer Question Below----------------------------------

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