Who's this person "plarpVofplapE" and why'd they resurface this particular thread with a "My test this forum number 3" message?
Anyway, with the switch to digital commumications instead of analogue, the Earth is sending much less signals into space,and beaming a smaller signature of activity into the cosmos.
Where did the photo of Earth from the moon in the article below come from if not from astronauts?
Earth becoming invisible to aliens
Chances of earth being detected by alien life forms are disappearing because of the digital revolution,
a leading space scientist has claimed.
By
Martin Evans
Published: 6:36AM GMT 26 Jan 2010
Earth becoming invisible from deepest space Photo: GETTY
Dr Frank Drake said the phasing out of analogue transmissions from television, radio and radar was making our planet electronically invisible from outer space.
While old style signals used to spread out millions of miles into outer space, even reaching some distant stars, digital transmissions are much weaker and therefore are less easy to detect by extra-terrestrial life forms.
Scientists on earth are constantly monitoring the heavens for any sign of transmissions from other planets and it is assumed other life forms out there will be doing the same.
But Dr Drake, who founded the US based organisation Search for Extra-terrestrial Intelligence (SETI), 50-years ago, said the phasing out of analogue transmissions was making this virtually impossible.
He said the earth used to be surrounded by a 50 light year wide shell of radiation, with old-style television transmissions generating around one million watts.
But he said with satellites aiming much of their transmissions towards earth now virtually no radiation was escaping into outer space.
He explained: "Now the actual amount of radiation escaping is about two watts, not much more than you get from a cell phone. If this continues into the future, very soon our world will become undetectable."
Dr Drake said he remained convinced that intelligent life does exist somewhere in the universe but suggested it was likely to be much more advanced than here on earth.
He told a meeting at the Royal Society in London: "We're going to have to search many more stars and many more frequencies."
From and for comments on this article go to:
http://www.telegraph.co.uk/science/7077464/Earth-becoming-invisible-to-aliens.html
op::+clueless
Yes, all electromagnetic radiation -- from radio waves to x-rays -- 
