I guess you are not up to speed on basic physics.  I'll explain.  The reason
Nasa can use radio to communicate with the space shuttle is because the
shuttle is in orbit around our planet.  It's very close to us.  But when you
are talking about communicating with ETs on a planet that may be on the
other end of the galaxy then it may take hundreds of years.  Radio waves
travel at a fixed speed of 186,000 miles per second.  Even talking to an
astonaut on Mars would take ten minutes before you heard his reply.  To
receive a signal from the closest star to us (Alpha Centuri) would take over
four years.

So if the ETs are out there, you can bet they won't be using radio for
communication.  They will be using something else which travels faster.
Something we have not discovered yet.  Something like Star Trek's subspace
radio which is not limited to the speed of light.  Who knows?  Maybe there
are clues to these technologies hidden in the crop circles which turn up
from time to time.

DaveL


"John Donson" <harigejan@hotmail.com> wrote in message
news:40ead4df$0$8444$ba620dc5@nova.planet.nl...

DaveL wrote:

What makes you think ETs will be using radio?  Especially when it
would typically take over a hundred years for such signals to reach
a destination.

DaveL

No it doesn't. You watch tv every day, don't you? Use a mobile phone?

Listen

to the radio? How do you think NASA keeps in touch with a Space Shuttle?
ISS?