Allyson Jagow, age 14, of Galesburg, Ill., for her question:

Can radio go through space?

The radio telescope is one of the newest instruments for studying the distant heavens. An ordinary telescope catches beams of light, and the radio telescope catches radio waves from the stars. Both the lift and the radio can travel across billions and billions of miles of empty space, for both are forms of electromagnetie energy.

Ordinary sound cannot travel through Empty space, and above the Earth's Atmosphere our ears could hear nothing. But the nothingness of space is filled with radio waves from across the galaxy, though we need a radio receiving set to change these radio waves into sounds that our ears can hear.