What Do I Do If I Get This Job?
Jobs & Education1 min ago
Would Aliens Scanning Their Skies, Searching For Life On Other Planets, Easily Find Our Transmissions?
Do we beam like a lighthouse across the empty infinity of space?
http://
http://
Answers
Best Answer
No best answer has yet been selected by sandyRoe. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.
Radio transmission have been made for about 120 years so any recipient of those signals would have to be within 120 lightyears of Earth. There are about 15000 stars within that distance and the chances of life starting on any planets orbiting those stars (and they'd need to be a sufficiently advanced civilisation) is minimal.
I sometimes think the cosmos is full of alien radio traffic. They've somehow excluded us but on this one occasion they allowed the screen to drop.
https:/
https:/
I'm not sure, because one also has to take into account the quality of radio signals, losses of power due to atmosphere etc, power loss over distance. The radio noise from Earth currently is probably not much more than a whisper on the scale of the cosmos, drowned out by more powerful, natural sources.
Or not. I'd have to do some reading into this, but my suspicion is that we're closer to a dim candle than a lighthouse.
Or not. I'd have to do some reading into this, but my suspicion is that we're closer to a dim candle than a lighthouse.
The last I heard from Stephen Hawking on the subject, although he thought alien life exists he also thought that finding it would not be a good idea.
http://
However, I'm very pleased he's changed his mind .... but I think the search should start right here on earth.
(sandyRoe, this would have been better placed in 'Science' - it wouldn't disappear from there as quickly as it will from here. Any chance of getting it moved?).
http://
However, I'm very pleased he's changed his mind .... but I think the search should start right here on earth.
(sandyRoe, this would have been better placed in 'Science' - it wouldn't disappear from there as quickly as it will from here. Any chance of getting it moved?).
I think there are countless other civilizations 'out there' but as the nearest stars with a possibility of inhabitable Planets are at least 400 light years away, how can we ever communicate with them?
We could send a message saying 'hello anyone there' but the reply would be at least 800 years later.
We could send a message saying 'hello anyone there' but the reply would be at least 800 years later.
Eddie, our nearest neighbour with planets thought to be potentially capable of supporting life is approximately 4 light years away - not 400.
http://
http://
Thanks for the link, Naomi -- I had thought that it was a lot closer than Eddie's 400 light-years, but wasn't aware that it might even be as close as possible! 4.3 light-years still a huge distance to travel, and the article suggests there's still some dispute, but even so the idea that extraterrestrial life may be that close has to be considered seriously cool.
Not quite sure what you mean about "starting right here on Earth", although perhaps it's better not to ask... certainly there's plenty of cool stuff about life on Earth still to learn.
Not quite sure what you mean about "starting right here on Earth", although perhaps it's better not to ask... certainly there's plenty of cool stuff about life on Earth still to learn.
//Not quite sure what you mean about "starting right here on Earth", although perhaps it's better not to ask... certainly there's plenty of cool stuff about life on Earth still to learn.//
There's some mighty suspicious neighbours living just down the street from me . . . at least they've given me some very peculiar looks. :o/
There's some mighty suspicious neighbours living just down the street from me . . . at least they've given me some very peculiar looks. :o/
List of potentially habitable planets here with distance , nearest 11 LY out to 2500LY.
https:/
https:/
Related Questions
Sorry, we can't find any related questions. Try using the search bar at the top of the page to search for some keywords, or choose a topic and submit your own question.