Andromeda.
one of the closest galaxies to us is the Andromeda galaxy, which is about 2.5 million light years away.
That would be a good explanation, as in the movies deja vu and source code. With mirrors at certain distances from the earth you could review the past.
Just a concidence..
Andromeda Constellation Stars
According to Ptolemy, the influence of this constellation is similar to that of Venus, though the legend would lead one to suppose some connection with Virgo. It is said to bestow purity of thought, virtue, honor, and dignity upon its natives, but to cause battle with chimerical fears and a tendency to become easily discouraged. By the Kabbalists it is associated with the Hebrew letter Pé and the 17th Tarot Trump, The Stars” If Mars afflicts the luminaries from Andromeda and especially if in an angle, it causes death by hanging, decapitation, crucifixion or impalement. [1]
https://astrologyking.com/constellation-andromeda/