RE: No ET! Ever?
February 19, 2017 at 3:37 pm
(This post was last modified: February 19, 2017 at 3:39 pm by Jehanne.
Edit Reason: I can spell better than Donald Trumnp.
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(February 19, 2017 at 2:55 pm)Mr Greene Wrote:(February 18, 2017 at 11:50 pm)Jehanne Wrote: Your original claim was, "the stars are in pretty much the same positions as when they were observed by the Greeks / Ancient Chinese." (emphasis mine).
In any case, the proper motion of the Sun around the center of the Galaxy (at nearly 700 times the speed of sound), would be sufficient to cause a narrow band radio transmission to miss the Earth, not to mention the Earth's motion around the Sun (around 60 times the speed of sound).
The wobble on the Earth's axis is an irrelevance, and calculating deflection could be done by fighter pilots in combat so hardly an insurmountable problem.
In any case unless you were targeting a specific star for some unspecified reason a general area would suffice.
We're talking Mach 690 or so, not to mention the fact that ET's system is also in motion by a similar amount, but on a different vector, which will only compound the problem. Also, don't forget that laser light is still subject to the inverse law:
https://www.quora.com/Is-the-light-from-...ht-sources
And, so, once again, ET's transmitter is going to have to be at least in the billions (or, trillions) of watts in order to get a sustained signal, and, we are going to have to be looking for such a signal at the right time and the right spot in the sky. And, this is something that we are not doing, at least at present.