This is a question from a previous, now-defunct version of the Temple of Quetzalcoatl, that I've posted here as an exemplar of one of the difficult puzzles you might encounter while solving it. This was one of the last puzzles I'd created before rebooting that section of my website, and nobody to my knowledge had solved it on their own before I put it here.
Quetzalcoatl shoots a straight, thin beam of red light out of his mouth, like a laser beam, and points it at a group of stars. He starts flicking and swishing this beam of light, appearing to make it cut hot scars into the night sky. When he is done, you see a series of lines, in the form of a constellation:
And behind you, directly opposite of where Quetzalcoatl drew his original image, you see the exact same image burned into the empty, starless sky, but now with a single point of light shining brightly next to it:
Quetzalcoatl asks you, "Do you know, my student, what star that is?"