What radio signal have NASA transmitted to outside our solar system and what did they contain?

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    $\begingroup$ "Free food & slaves - planet #3". $\endgroup$ – void_ptr Jun 19 '20 at 22:43
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    $\begingroup$ All radio waves with a high enough frequency that were emitted are outside of the solar system, or at least, will be. $\endgroup$ – Star Man Jun 19 '20 at 23:35
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    $\begingroup$ Is the accepted answer really the answer you were looking for? Your questions asks about radio signals "...NASA transmitted to outside our solar system..." which to me sounds like you really wanted to know which ones had intended targets beyond the solar system. If so, then you can consider un-accepting the current answer and clarifying your question. $\endgroup$ – uhoh Jun 20 '20 at 12:52
  • $\begingroup$ List of interstellar radio messages en.wikipedia.org/wiki/List_of_interstellar_radio_messages $\endgroup$ – A. Rumlin Jun 20 '20 at 15:45
  • $\begingroup$ @A.Rumlin Cool! $\endgroup$ – user36677 Jun 20 '20 at 17:27

Every command sent to a satellite or space probe from Earth continues traveling, forever.

At some point it becomes so weak it's impossible to interpret, of course, but NASA routinely receives data transmitted from the two Voyager spacecraft, both of which are now on the outer side of the Solar System's boundary shock, and both of which, due to aging of their onboard power sources, now transmit at only a few watts (directional transmission helps a lot, but even so, large dish antennas are required on the ground).

Similar equipment to the large dishes at Very Large Array, Green Bank, etc. could receive commands intended for, say, a Mars orbiter to distances well beyond the heliopause.

There have been intentional transmissions toward other star systems, as well (at least one globular cluster was targeted by a strong transmission from Arecibo, though that signal will not arrive for another few thousand years), but none were initiated by NASA. NASA, as far as I know, adheres to the United Nations protocol prohibiting attempting contact with extraterrestrials without the consent and supervision of the United Nations.


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