DaveL wrote:

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?