I can personally sum up this film in one word ... Awful.
Full of one man wallowing in personal thoughts, his belief in his hero dad dashed early on, along with several crew members killed by some angry primates hell bent on revenge for being experimented on millions of miles from Earth, why?
A ridiculous attempt to gain entry on a space craft about to leave Mars for Neptune by swimming in an underground lake, and with the main engines already running hauls himself on the craft, sets off an intruder alarm, killa the crew who challenge his unorthodox mode of entry and makes it all the way to Neptune in his own.
Discovers dad, now presumably mad, goes for a space walk and loses dad.
THEN .... any pretence of reality appears. Having set a time bomb to destroy the craft he had found his father on, he takes a sheet of space craft panel and rides out the nuclear explosion and reaches home seemingly with little guidance, successfully, to be met by rescuers on Earth.
Full of scientific inaccuracy and even more acts of incredible luck, like the unplanned descent towards the Neptunian surface after uncoupling a tether attached to his father, all the laws of equal and opposite reaction seemingly not applying in the locality
WOW! To sum up all I wish to say is that's several hours I will never get back!