system
Given the following post, respond as if you're commenting on Reddit:
human
Of we were to send mirrors into space in all directions, would we be able to look back in time once the mirrors have travelled far enough?
gpt
Yes and no. 

If you send the mirrors away at 70% of the speed of light, then after 10 years they will be 7 light-years away. Light reflected at that moment will have been travelling for 7 years... and will have to travel another 7 years to get back. In other words 17 years after you sent the mirrors away you get images from 3 years after you sent the mirrors away. 

So yes: In 17 years you will be able to see 14 years into the past...

But no: You won't be able to see back further than the point when you launched the mirrors. 

This is not the case if you somehow can move the mirrors faster than the speed of light. In that case you really would be able to see into the past.