Why Is There No Sound in Outer Space?

Answer

The reason why there is not sound in outer space is because it is a vacuum. Sound travels faster in air therefore, the presence of a vacuum inhibits sound movement.
Q&A Related to "Why Is There No Sound in Outer Space"
There is no sound in outer space because it is a vacuum. Sound needs matter to travel through and vibrate in order for us to hear it. Air vibrates in our ears to make us hear sound,
http://www.ask.com/web-answers/Science/Other/why_i...
In space, nobody can hear you scream, but it doesn't mean there's no sounds up there. Black holes generate sound. There's always one nearby.
http://wiki.answers.com/Q/Why_are_there_no_sounds_...
You see stuff/colors when light bounces of surfaces. Since there "isn't" anything in space for light to bounce of into your eyes, you just see black.
http://www.quora.com/Outer-Space-1/Why-is-it-black...
The initial reason for sending animals into space was to test rocket components prior to launching humans and risking their lives. The primary role of these animals focused on testing
http://www.ehow.com/info_8337293_do-send-animals-o...
1 Additional Answer
Sound needs a medium in order to exist. However, there is no medium in space. Therefore, sound cannot exist in space. The movie scenes depicting noisy explosions in space are just not realistic. You can find more information here: http://students.ed.uiuc.edu/ljgriffi/project/grifunit8/NotesSound.htm
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