Can radio waves travel through a vacuum?

Answer 1

Here are a few vehicles and systems that are controlled and report by radio:

-- Apollo command modules on the way to the moon, and Apollo astronauts on the the moon

-- the International Space Station

-- the Hubble Space Telescope

-- the Mars rovers

-- the Pioneer, Viking, Cassini, and other robotic space probes

-- geostationary satellites that beam 597 channels of TV to the little dish on your garage

-- GPS satellites

-- weather satellites

Radio works quite well in a vacuum.

Answer 2

Yes
Of course they can. How do you think we receive ANY signals from space.....