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Space is completely silent because there is no air to carry sound.

Space is completely silent because there is no air to carry sound.

Sound travels as vibrations through air, water, or solids. Space is almost a perfect vacuum with hardly any particles, so those vibrations have nothing to travel through — and no sound can be heard.

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More facts about Space Travel

Astronauts float around inside their spaceship. Astronauts float around inside their spaceship. Rockets need lots of fuel to blast up into space. Rockets need lots of fuel to blast up into space. Astronauts wear special suits so they can breathe in space. Astronauts wear special suits so they can breathe in space. Footprints left on the Moon can stay for millions of years. Footprints left on the Moon can stay for millions of years. The Space Station is a home in space that circles Earth. The Space Station is a home in space that circles Earth.