The way she hesitates pretty much says all that for her, of course, so Eridan scowls at her momentarily before... well, giving up that fight. He doesn't like the idea of people walking on eggshells around him. Well, okay. He wouldn't mind some more consideration, but he'd rather it be out of respect or fear than... being sorry for him, or whatever this shit was going to be.

He looks back at his communicator, almost as if he's completely dismissed her. Then, when she asks, he glances back up and says, "Somethin' about astronomy an' shit. Not really sure, I havven't been payin' it much attention to be honest. Doubtful it'll be useful, since wwe can't evven see the constellations around us." There's a pause. "Wwhat are you doin' here?"