In space no one can hear you scream?
Alien That is correct. Sound does not travel through a vacuum.
The astronauts have to use radios to communicate with each other in
a non pressurized environment like a space walk or on the surface
of the moon.
That depends; in your pressurized space habitat, anyone within earshot will be able to hear you. Outside your habitat, but in your space suit, your radio will enable your screams to be heard anyplace with a radio. In space but without a spacesuit, you would be unable to scream - because you would be dead or dying. You can only survive without air for perhaps 2 minutes, but you would be unconscious from lack of…
One of the tag lines for the 1979 sci fi movie Alien was "In space, no one can hear you scream." Two reasons for this: First, and most importantly, it is a vacuum. Sound does not travel in a vacuum. Secondly, and more metaphysically, space is a vast empty place. It is lonely. Nowhere else in existence can you be potentially and have no one around literally for light years.
What are the ratings and certificates for One Foot in the Grave - 1990 In Luton Airport No-One Can Hear You Scream 2-1?
Yes, no sounds in absolute vacuum. A vacuum is the most efficient sound insulator. There is nothing to compress to transmit the sonic energy. So those science fiction movies with explosions with loud sounds in space and whizzing "tie fighters" ... nope... couldn't happen. In space no one can hear you scream
Sound cannot travel through vacuums. It needs a medium for its waves to process, meaning the molecules need to vibrate in order for sound to be heard. Space is a good example of a vacuum that sound cannot travel through. In the movie Alien, they tag line : "In space, no one can hear you scream," and that is true.