NASA has huge radio receivers to gather information from space missions. These must be precisely aimed so they can get the waves. Likewise, NASA must precisely aim transmissions to spacecraft so that these ships can hear the messages. What are uplink and downlink? Member FAQ. The Children's Museum Today's Hours: 10 am—5 pm. Buy Tickets. Things to Do. Museum Blog. Why can't astronauts whistle in space?
When astronauts are out in space, they can whistle, talk, or even yell inside their own spacesuit, but the other astronauts would not hear the noise. In fact, the middle of space is very quiet. Sound travels in waves, and it moves at different speeds through air or water or other materials. That's why the astronauts use radios to communicate—even if they're floating in space right next to each other! When astronauts are inside the International Space Station, they're in a simulated atmosphere.
It allows them to breathe without wearing space suits all the time. Sign Up for Email. By signing up I agree that I am 13 years or older, or I have my parent or guardian's consent. Buy Tickets Membership Donate. Random Question. Does quantum entanglement imply faster than light communication?
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