[Schweitzer]

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How are you observing the photons passing through the slit from so far away? I don't think a telescope is sufficient. Based on my understanding, you have to actively interfere with the experiment in order to observe those photons, which is the issue. If you're a light-minute away, you can't interfere with the experiment. If observation is happening then it must happen before the photons enter the slits - it might take a minute for information about the observation to reach you, but that's just "lag." If nobody is "getting their hands dirty" at the location of the experiment, I think you'll just see a wave-like interference pattern through a telescope.

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Ok, so I shine high frequency light upon the experiment. If I observe the light I should be able to detect the electrons as particles and determine which slit they went through. (I realize they were a wave before this and the measurement will collapse them to being in front of one of the slits)
In this system I will certainly see a particle pattern.

If, however, I shine the light on the experiment but the light is not observed, will I not see an interference pattern? And if that is the case, wouldn't someone with a powerful detector be able to detect the light from this experiment after the experiment has been finished?