Greg watches the racing cosmos, flickering over the pool of sky between his hands (man he totally ought to write a song with that line). The mirror is silent, but the image is intense. Whatever it's trying to say, it means it.

He stares at that one central star, brightest and beckoning, and after a moment its meaning comes to him.

"Homeworld."

As much as the mirror put in that image, Greg put in that word: Understanding, anxiety, uncertainty, fear.

Homeworld had wanted to do a lot of terrible things to Earth. Was the mirror part of that? Did it get used for any of those goals, does it have the same desires?

Greg glances away. "You miss it, huh."