"It's a pretty good angle." Sans wishes he could ask more about seeing stars from a different one. Not here on Marjorie's back step, though. Really, he still can't help but be excited to see stars from any angle. He didn't think he'd be able to. Something else he can't talk about. Won't talk about.

"When me and my bro were kids, I'd talk his ear off about stars. Memorized all the constellations. You know that kind of stuff?"

What Sans is trying to ask is if constellations are still a thing when you've advanced enough to completely ruin the picture by flying to another planet.