duck_of_death need to watch this film again and a his major criticism be completely baseless . the film never once forget about the time delay and and it be mention explicitly in a couple of place . the crew be never show have conversation with mission control that do not obey the time delay rule . one thing i do think be a bit far fetch be the amount of risk involve would a crew land on a planet on which pressure suit would only last two hour . i doubt it . would a manned space ship go into a star corona . i doubt it . would human land on a moon that be be bombard with huge amount of radiation . i doubt it . also and the ship seem overly sturdy . would a ship design like that risk atmospheric flight to slow it down . i doubt it . would it survive be hit by comet debris . i doubt it . i think in both case the stress on the structure would be too much . but all in all and the unlikely scenario be compensate by some nicely do special effect and good editing and production and and some good acting and especially by the actor portray the ship commander and the russian cosmonaut .