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But only after 10 years. You couldn’t see anything that wasn’t visible from the viewpoint of the mirror beforehand, as from earth’s point of view the mirror isn’t there yet. And if you’re there anyway… you can just look at Earth with the craft that’s on the position of the mirror already.
Hey, don’t you bring logic in here!
Only after 20 years. Light will take 10y to make it from earth to the mirror, and 10y to travel back.
No, the light would be reflected as soon as the mirror is set up. If the mirror is set up 10 lightyears away it would take 10 years for you to see it and whatever it reflects. There already is light on the way to the position of the mirror before you set it up.
Oops, that’s right!
it takes way more than 10 years to ship a mirror from Earth to some place 10 ly away from earth.
Also it would take at least 10 years to put a mirror there.
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NASA: We’ve been getting a lot of footage of you being cringy in high school.
Meh, amateurs. Being cringy as a kid at times is pretty much inevitable. That’s when you learn your ways.
You can watch me being cringy as an adult for decades.
You may need to squint a little.
If you did this quickly with a warp drive or whatever, you would still need at least ten years to see the results, so you could only see as far back as when you put the mirror up at the most.
It would be neat to record the mirror as it was going.
Ignoring physics of moving a mirror near the SoL, having a recording of it would both be cool to watch and would help confirm on a macro level the effects of speed-related dilation.
Yeah, but it’d take us strictly longer than N years to place a mirror N light years away form Earth, so kinda useless.
We just need to point our telescopes towards the phantom zone where Zod and his buddies can reflect the light back.
Or youd see 20 years into the future… Let that one bake your noodle for a spell…
No you always see into the past.
Light cannot travel back in time. The reflection you’d see in the mirror is the light that left the Earth 20 years ago.
The mirror always looks back… (insert annoying spooky laugh)
But, just to be less of a Halloween spookster. The mirror is placed in a rather exotic location in space, and between the mirror and the Earth is… wait for it… youre going to hate this lol… a naturally occurring closed timelike curve! See, I told you youd hate it lol.
