"The Stars, Like Dust" by Paul Lehr

another image that i'm not certain is a portal[^1] (it could just be a mirror or something), but it looks like a portal so i'm posting it

cover art to asimov's "the stars, like dust", as well as paul anderson's "guardians of time"

image source

[^1]: i'm not very good at this, clearly - i'm just sharing art i think is cool