Are you thinking of a "quasar" ?
Radio waves travel at the speed of light, so radio waves broadcast 100 years ago that were strong enough to reach into space are 100 light-years away.
The question is too vague for an answer. It depends on the intensity of the radio wave source.
You can get a radio signal from space on your computer using SETI.
We are listening with radio telescopes for radio signals from space, that sound as if they might come from an intelligent source (i.e., modulated, like a fax machine over a telephone)
usten were coming home
radio astronomy...:)
radio astronomy
A space word that starts with z is Zaurak.
A radio telescope.
Electromagnetic waves, such as light and radio waves, can travel through a vacuum like space because they do not require a medium to propagate. This is because they consist of oscillating electric and magnetic fields that can travel through empty space.
orbit
Objects such as pulsars, radio galaxies, supernova remnants, and active galactic nuclei are known to emit radio waves in space. These emissions can be detected by radio telescopes and provide valuable information about the nature and behavior of these cosmic objects.