70s Soviet science fiction film?

[CosmicMonkey]

Please help. I watched this film as an installation at a museum a few years ago. The exhibit was about the differences between Soviet and American futurist architecture, and this film was shown as an example of the Soviet futurist style.

I'm probably misremembering some of the details, but this is what I recall from it:

Colour film (from the 60s or 70s) Soviet sci-fi inspired by the Space Race, about a crew of cosmonauts orbiting a planet that they are studying. One of the crew goes down to the surface, but a storm hits and he loses communication with the rest of the crew, and two other crewmembers (alongside a robot that kind of looks like a giant R2D2) go down to the planet's surface to rescue him, but if they all don't get back to the ship in a certain amount of time they will be left behind. There's a woman cosmonaut monitoring the crew's progress back on the ship and she narrates the movie through monologues. The planet is Earth-like with volcanoes and oceans. The crew finds the ruins of an ancient advanced alien civilization. I think they go underwater at some point. There's a hover car and the crew has vaguely Star Trek looking uniforms. The pace was slower and more philosophical, it was not really an action film. At the end of the film the robot dies, as the rest of the crew has to sacrifice him to get past a lava floe. The robot was invented by one of the cosmonauts and it's a sad moment between "father" and "son".

I also think the title might have been two titles separated by a colon, but I'm not sure about that.

[djross]

Sounds like a 1962 movie I haven't seen called Planeta Bur. Here's the video: https://www.youtube.com/watch?v=-VTF23EFvEM

[CosmicMonkey]

Sounds like a 1962 movie I haven't seen called Planeta Bur. Here's the video: https://www.youtube.com/watch?v=-VTF23EFvEM

Yes, this is it! Thank you!

(I can't believe I forgot about all the dinosaurs)

[djross]

Apparently the film was re-edited twice for Roger Corman: first by Curtis Harrington as Voyage to the Prehistoric Planet (1965) and again by Peter Bogdanovich as Voyage to the Planet of Prehistoric Women (1968). The director sounds like kind of an interesting guy, who mainly made films that mixed scientific content with some kind of speculative aspect, until he fell out of favour.