In the double slit experiment, the awareness is not influencing the outcome. The act of measuring is. Pretty sure the act of measuring the galactic bodies has no impact on them in any meaningful way.
There is no way to verify that. Big parts of quantum physics is more or less pseudoscience.
So they could capture the light and attempt to capture the "same" light again later to try to verify or change the result they received.
I did some more reading about it after posting, and the original experiment was intended to test if light "chooses" to be a wave OR a particle in a way they could affect, and that it could only be one or the other at a time. The truth seems to be more that it acts as both at the same time and whatever sensor equipment you use to pick it up is what it acts like.
[citation needed]
As I understand the double slit experiment, this is a fundamental property of light as a photon exhibits wave-particle duality. If so, retrocausality in this case would just mean the fundamental wave function can be collapsed into actuality without time or space being involved.
Am I far off base?