Patting the spot on the blanket beside him, Nightmare looked up at the stars, enjoying the peaceful silence. Despite what people thought, he loved being outdoors, mainly at night, so he could marvel at the sky, and stars.

Look, over there. If you start at the big star there, you can see the Canis Major. One of my favorite constellations.

Nightmare pointed up, and drew the outline of the stars out to you, in order to help you visualize it better. He gently helped explain it to you.