RE: No ET! Ever?
February 19, 2017 at 2:55 pm
(This post was last modified: February 19, 2017 at 2:57 pm by Mr Greene.)
(February 18, 2017 at 11:50 pm)Jehanne Wrote:(February 18, 2017 at 11:43 pm)Anomalocaris Wrote: That picture you show reflects the precession of equinox. It has nothing to do with earth's motion or proper motions of target stars and therefore does nothing to increase the difficulties of targeted transmission.
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.
Quote:I don't understand why you'd come to a discussion forum, and then proceed to reap from visibility any voice that disagrees with you. If you're going to do that, why not just sit in front of a mirror and pat yourself on the back continuously?-Esquilax
Evolution - Adapt or be eaten.
